Added stale load-path problems.

diff --git a/etc/PROBLEMS b/etc/PROBLEMS
index 3da6d892a9753ee80b52bb96f14f6c21350cb418..723214132b72b3120530b42282279f452a9dea18 100644 (file)
--- a/etc/PROBLEMS
+++ b/etc/PROBLEMS
@@ -1041,6 +1041,32 @@ file could fail to load if it is compressed.
 The solution is to uncompress all .el files which don't have a .elc
 file.
 
+Another possible reason for such failures is stale *.elc files
+lurking somewhere on your load-path.  The following command will
+print any duplicate Lisp files that are present in load-path:
+
+    emacs -q -batch -f list-load-path-shadows
+
+If this command prints any file names, some of these files are stale,
+and should be deleted or their directories removed from your
+load-path.
+
+* Emacs prints an error at startup after upgrading from an earlier version.
+
+An example of such an error is:
+
+  x-complement-fontset-spec: "Wrong type argument: stringp, nil" 
+
+This can be another symptom of stale *.elc files in your classpath.
+The following command will print any duplicate Lisp files that are
+present in load-path:
+
+    emacs -q -batch -f list-load-path-shadows
+
+If this command prints any file names, some of these files are stale,
+and should be deleted or their directories removed from your
+load-path.
+
 * Attempting to visit remote files via ange-ftp fails.
 
 If the error message is "ange-ftp-file-modtime: Specified time is not