Maybe Meta Issue isn't right, but Bug isn't right because 1.6 isn't supported. However...
1. On Linux there is a problem when two (or more) projects are opened. The one of them is on top and I can't alt-tab to another one. Neither the other projects show in the task list. I have to minimize project on top and then I can use the window beneath. Other windows (xterms/whatever) works fine in the same desktop.
2. Really cosmetics: The question "Would you like to open the project in a new frame?" is in the white box instead of the same background like the rest of the dialog (gray). 1.5 is fine (whole background is gray).