Reproduced at least once with a stable 0.48.x build too (backtrace of a crash after toggling maximized window state on and off with Inkscape 0.48.4 attached).
I haven't found the actual trigger - it seems too random to reproduce. The same applies for tests with archived builds: results are not consistent, but the crash reproduced at least once with the oldest trunk build I have available on this computer (r10795).
Reproduced at least once with a stable 0.48.x build too (backtrace of a crash after toggling maximized window state on and off with Inkscape 0.48.4 attached).
I haven't found the actual trigger - it seems too random to reproduce. The same applies for tests with archived builds: results are not consistent, but the crash reproduced at least once with the oldest trunk build I have available on this computer (r10795).