Thanks to Jerry James :-)
Upgrading did the trick.
Itay
On Sat, 20 Dec 2003, Jerry James wrote:
I wrote:
It turns out that RedHat 9 has a rather old version of aspell. I
downloaded the latest version from
http://aspell.net/, and this behavior
has disappeared. That is, both buffers spell check correctly. I think
it is safe to say that this is an aspell bug, not an XEmacs bug.
Upgrade your aspell to make it go away.