gimp bug? or?

I have the latest gimp compiled from macports, on my leopard system (macbook pro, 15"). It works fine but it gets buggy when I try to save- as a file twice. For example, if I open "huge-image.jpg" and resize it by half and save as "not-as-huge.jpg" and then try to save as "not-as- huge2.jpg", the save as dialog has no buttons or text. If I select all and paste as a new image I can save that just fine. I'm not sure if the bug is with gimp (this doesn't happen with gimp on linux, I can testify to that much), or gtk2 or x11 or what? Anyone have this issue? Again to reproduce this just to try run "save as" more than once on an image. Thanks! --Mike H