XWindows crashes

Hi 

I have several RedHat 9 machines running PgAdmin III v 1.0.2.
For the most part, PgAdmin is running well, but we have had frequent
crashes. These crashes are usually associated with selecting 
and (possibly dragging) text in the SQL windows. The mouse 
cursor changes to a right-angle, and X-windows immediately stops 
responding to the mouse (with luck at this stage X will respond to
ctrl-alt-backspace). 

I had a quick look through the archives and could not find any
other reports of this problem. Has anyone got a work-around/fix?

Thanks 

Greg Ford