I'm not sure if this is a bug in WA or in DW but I'll describe it here:
I opened a file in Powerstore which was "read only" and I opened it as "view" because I only wanted to look at the code making sure that it isn't inadvertantly changed while I work on the actual site.
I was trying to see what the validation server behaviors were. The file was checkout.php. When I mouse on the server behaviors panel, the mouse icon sits and spins a while and then the whole panel goes blank. Blank as in there is nothing there, just a bare gray panel. Also the bindings and databases panels are blank. I can mouse to those panels but nothing there. Close the checkout.php and still nothing. Back to the other site, open files, whatever...... nothing restores the server behaviors panel. The only way to recover is to close everything, and exit DW.