diff --git a/poky/scripts/lib/buildstats.py b/poky/scripts/lib/buildstats.py
index fa94c65..6db60d5 100644
--- a/poky/scripts/lib/buildstats.py
+++ b/poky/scripts/lib/buildstats.py
@@ -234,6 +234,7 @@
         """
         Parse the top-level build_stats file for build-wide start and duration.
         """
+        start = elapsed = 0
         with open(path) as fobj:
             for line in fobj.readlines():
                 key, val = line.split(':', 1)
diff --git a/poky/scripts/lib/devtool/upgrade.py b/poky/scripts/lib/devtool/upgrade.py
index 967d157..6c4a62b 100644
--- a/poky/scripts/lib/devtool/upgrade.py
+++ b/poky/scripts/lib/devtool/upgrade.py
@@ -125,11 +125,8 @@
     return af
 
 def _cleanup_on_error(rd, srctree):
-    rdp = os.path.split(rd)[0] # recipes folder
     if os.path.exists(rd):
         shutil.rmtree(rd)
-    if not len(os.listdir(rdp)):
-        os.rmdir(rdp)
     srctree = os.path.abspath(srctree)
     if os.path.exists(srctree):
         shutil.rmtree(srctree)
diff --git a/poky/scripts/lib/resulttool/log.py b/poky/scripts/lib/resulttool/log.py
index eb3927e..15148ca 100644
--- a/poky/scripts/lib/resulttool/log.py
+++ b/poky/scripts/lib/resulttool/log.py
@@ -28,12 +28,10 @@
 def log(args, logger):
     results = resultutils.load_resultsdata(args.source)
 
-    ptest_count = sum(1 for _, _, _, r in resultutils.test_run_results(results) if 'ptestresult.sections' in r)
-    if ptest_count > 1 and not args.prepend_run:
-        print("%i ptest sections found. '--prepend-run' is required" % ptest_count)
-        return 1
-
     for _, run_name, _, r in resultutils.test_run_results(results):
+        if args.list_ptest:
+            print('\n'.join(sorted(r['ptestresult.sections'].keys())))
+
         if args.dump_ptest:
             for sectname in ['ptestresult.sections', 'ltpposixresult.sections', 'ltpresult.sections']:
              if sectname in r:
@@ -48,6 +46,9 @@
 
                     os.makedirs(dest_dir, exist_ok=True)
                     dest = os.path.join(dest_dir, '%s.log' % name)
+                    if os.path.exists(dest):
+                        print("Overlapping ptest logs found, skipping %s. The '--prepend-run' option would avoid this" % name)
+                        continue
                     print(dest)
                     with open(dest, 'w') as f:
                         f.write(logdata)
@@ -86,6 +87,8 @@
     parser.set_defaults(func=log)
     parser.add_argument('source',
             help='the results file/directory/URL to import')
+    parser.add_argument('--list-ptest', action='store_true',
+            help='list the ptest test names')
     parser.add_argument('--ptest', action='append', default=[],
             help='show logs for a ptest')
     parser.add_argument('--dump-ptest', metavar='DIR',
diff --git a/poky/scripts/lib/resulttool/regression.py b/poky/scripts/lib/resulttool/regression.py
index 74fd5f3..1facbcd 100644
--- a/poky/scripts/lib/resulttool/regression.py
+++ b/poky/scripts/lib/resulttool/regression.py
@@ -190,11 +190,20 @@
             else:
                 logger.error('Failed to retrieved base test case status: %s' % k)
     if result:
-        resultstring = "Regression: %s\n            %s\n" % (base_name, target_name)
-        for k in sorted(result):
-            resultstring += '    %s: %s -> %s\n' % (k, result[k]['base'], result[k]['target'])
+        new_pass_count = sum(test['target'] is not None and test['target'].startswith("PASS") for test in result.values())
+        # Print a regression report only if at least one test has a regression status (FAIL, SKIPPED, absent...)
+        if new_pass_count < len(result):
+            resultstring = "Regression:  %s\n             %s\n" % (base_name, target_name)
+            for k in sorted(result):
+                if not result[k]['target'] or not result[k]['target'].startswith("PASS"):
+                    resultstring += '    %s: %s -> %s\n' % (k, result[k]['base'], result[k]['target'])
+            if new_pass_count > 0:
+                resultstring += f'    Additionally, {new_pass_count} previously failing test(s) is/are now passing\n'
+        else:
+            resultstring = "Improvement: %s\n             %s\n             (+%d test(s) passing)" % (base_name, target_name, new_pass_count)
+            result = None
     else:
-        resultstring = "Match: %s\n       %s" % (base_name, target_name)
+        resultstring = "Match:       %s\n             %s" % (base_name, target_name)
     return result, resultstring
 
 def get_results(logger, source):
@@ -206,12 +215,38 @@
 
     regression_common(args, logger, base_results, target_results)
 
+# Some test case naming is poor and contains random strings, particularly lttng/babeltrace.
+# Truncating the test names works since they contain file and line number identifiers
+# which allows us to match them without the random components.
+def fixup_ptest_names(results, logger):
+    for r in results:
+        for i in results[r]:
+            tests = list(results[r][i]['result'].keys())
+            for test in tests:
+                new = None
+                if test.startswith(("ptestresult.lttng-tools.", "ptestresult.babeltrace.", "ptestresult.babeltrace2")) and "_-_" in test:
+                    new = test.split("_-_")[0]
+                elif test.startswith(("ptestresult.curl.")) and "__" in test:
+                    new = test.split("__")[0]
+                elif test.startswith(("ptestresult.dbus.")) and "__" in test:
+                    new = test.split("__")[0]
+                elif test.startswith("ptestresult.binutils") and "build-st-" in test:
+                    new = test.split(" ")[0]
+                elif test.startswith("ptestresult.gcc") and "/tmp/runtest." in test:
+                    new = ".".join(test.split(".")[:2])
+                if new:
+                    results[r][i]['result'][new] = results[r][i]['result'][test]
+                    del results[r][i]['result'][test]
+
 def regression_common(args, logger, base_results, target_results):
     if args.base_result_id:
         base_results = resultutils.filter_resultsdata(base_results, args.base_result_id)
     if args.target_result_id:
         target_results = resultutils.filter_resultsdata(target_results, args.target_result_id)
 
+    fixup_ptest_names(base_results, logger)
+    fixup_ptest_names(target_results, logger)
+
     matches = []
     regressions = []
     notfound = []
@@ -243,29 +278,11 @@
         else:
             notfound.append("%s not found in target" % a)
     print("\n".join(sorted(matches)))
+    print("\n")
     print("\n".join(sorted(regressions)))
     print("\n".join(sorted(notfound)))
-
     return 0
 
-# Some test case naming is poor and contains random strings, particularly lttng/babeltrace.
-# Truncating the test names works since they contain file and line number identifiers
-# which allows us to match them without the random components.
-def fixup_ptest_names(results, logger):
-    for r in results:
-        for i in results[r]:
-            tests = list(results[r][i]['result'].keys())
-            for test in tests:
-                new = None
-                if test.startswith(("ptestresult.lttng-tools.", "ptestresult.babeltrace.", "ptestresult.babeltrace2")) and "_-_" in test:
-                    new = test.split("_-_")[0]
-                elif test.startswith(("ptestresult.curl.")) and "__" in test:
-                    new = test.split("__")[0]
-                if new:
-                    results[r][i]['result'][new] = results[r][i]['result'][test]
-                    del results[r][i]['result'][test]
-
-
 def regression_git(args, logger):
     base_results = {}
     target_results = {}
@@ -327,9 +344,6 @@
     base_results = resultutils.git_get_result(repo, revs[index1][2])
     target_results = resultutils.git_get_result(repo, revs[index2][2])
 
-    fixup_ptest_names(base_results, logger)
-    fixup_ptest_names(target_results, logger)
-
     regression_common(args, logger, base_results, target_results)
 
     return 0
diff --git a/poky/scripts/lib/resulttool/resultutils.py b/poky/scripts/lib/resulttool/resultutils.py
index 8917022..7666331 100644
--- a/poky/scripts/lib/resulttool/resultutils.py
+++ b/poky/scripts/lib/resulttool/resultutils.py
@@ -142,7 +142,7 @@
     return decode_log(ptest['log'])
 
 def ptestresult_get_log(results, section):
-    return generic_get_log('ptestresuls.sections', results, section)
+    return generic_get_log('ptestresult.sections', results, section)
 
 def generic_get_rawlogs(sectname, results):
     if sectname not in results:
diff --git a/poky/scripts/lib/wic/filemap.py b/poky/scripts/lib/wic/filemap.py
index 4d9da28..85b39d5 100644
--- a/poky/scripts/lib/wic/filemap.py
+++ b/poky/scripts/lib/wic/filemap.py
@@ -46,6 +46,13 @@
             bsize = stat.st_blksize
         else:
             raise IOError("Unable to determine block size")
+
+    # The logic in this script only supports a maximum of a 4KB
+    # block size
+    max_block_size = 4 * 1024
+    if bsize > max_block_size:
+        bsize = max_block_size
+
     return bsize
 
 class ErrorNotSupp(Exception):