Font-lock bug in 21.2.45

The current version of font-locking font-locks the following file incorrectly. The first #+:cmu is fontified as if it were a comment, but it's not. This doesn't happen with 21.2.44. To see this, I started xemacs -vanilla. Load the file. (The buffer is not fontified.) Kill the buffer. Load the file again. Now the buffer is fontified but fontified incorrectly. If you do the same with 21.2.44, #+:cmu and following is fontified correctly as lisp code, not a comment. Perhaps it's getting confused by the |# in column 0? Ray