find-tag hangs on Emacs 21.1 Win 2000.

[stephane saux]

I created a TAGS file using etags (same installation as emacs 21.1), 
then I issue the find-tag command.

In some cases, I can find a tag the first time I look for one, then any 
subsequent find-tag hangs.  Control-G will get me back where I was when 
I issued the command.

In other cases it fails at the first time or when I try to 
visit-tag-table. I've found that emacs will set both tags-file-name and 
tags-table-list even though the doc for there variables specify that 
only one should be set.

Any idea?