Remembering window sizes/positions?

Each time I open a module, windows seem to revert to their original positions and sizes. These positions are clearly stored somewhere and not generated algorithmically. Is there a way to make Vassal remember new locations when I reposition windows, or failing that, alter default window locations by editing the module? (This is in Linux if it makes a difference.)

I suppose I should follow directions! Most will likely be irrelevant, but just in case:
Model: Dell Latitude D620
Operating System: Linux (Xubuntu 10.04)
CPU: Intel Core 2 Duo T2300, 1.66 GHz
Memory: 2.5 GB
Video Card: Nvidia Quadro NVS 110M
Vassal version: 3.1.15
Java version: 1.6.0_20-b20
Vassal module name and version: Arkham_Horror_FFG 1.5.2
Steps to reproduce: Open module, either start new game or load saved game. Click P1, move/resize window that pops up. Optionally save game. Close game. Either reopen module or load saved game. Click P1, note that the window reverted to original position.