Interesting UI bug

["E. ALLAUD" <e allaud wanadoo fr>]

This bug bites me sometimes, and it seems like a gtk+ bug. I don't know 
how to reproduce it exaclty, but it happens when I check my POP3 mboxes 
and browse my mails at the same time (I suspect that it is triggered 
when interacting with the gtk tree view and balsa is updating it by 
adding the incoming mails). The tree is still functional but when you 
click on a mail it does not get displayed (ie the balsamessage callbakc 
is not called or blocked), and the cursor flickers (it seems to be 
refreshed a lot). Here is the bt obtained by hitting ctrl-c :

(gdb) bt
#0  0x410cfa0b in writev () from /lib/i686/libc.so.6
#1  0x4117e710 in XUnlockDisplay () from /usr/X11R6/lib/libX11.so.6
#2  0x4117f32f in _X11TransWritev () from /usr/X11R6/lib/libX11.so.6
#3  0x4115fdc7 in _XSend () from /usr/X11R6/lib/libX11.so.6
#4  0x4115524a in _XReverse_Bytes () from /usr/X11R6/lib/libX11.so.6
#5  0x4115598b in XPutImage () from /usr/X11R6/lib/libX11.so.6

This seems like a loop in X events. It is sufficient to click on 
another mailbox and back to the one the bug occured in to have all 
things functional again.
Weird, isn't it?
Bye
Mau