I've noticed an occasional problem with 21.5, where some other
application has the input focus, I click inside an XEmacs frame to
give it focus, and my next keypress produces a "Selection Aborted"
I've seen this ever since I started using 21.5 (many months ago), but
intermittently. This week I noticed that it only happens with Compiz,
not with Metacity. This is on Ubuntu Linux, both 9.04 and 9.10. It
may have also happened on openSUSE 10.<something>, but I don't
remember for sure.
I also got a sample stack trace:
Debugger entered--Lisp error: (error "Selection aborted")
signal(error ("Selection aborted"))
apply(cerror "Selection aborted" nil)
mouse-track(#<keypress-event control-A 0x44da>)