This has happened to me a few times with the post-sourceforge releases... I sometimes click the 'Edit game' button whilst I'm still playing the game itself, usually to read out a sequence very quickly if I'm short on time. When the bug appears, instead of the board appearing almost immediately, I see a progress bar which says something like "reading sgf file". The bar fills up relatively slowly, and then the editing screen appears, but it is not drawn properly... much of the window is blank. At this point, it is not uncommon for the bug to propagate into the other aspects of gGo's operation (i.e. my game window messes up), and I have to quit the program and restart it. - Michael