Hello all, and than you for your answers.
I just downloaded the latest nightly build (OpenXcom 0.9 git 2013-10-10 14:15) and the problem persists. At least now it's giving a more informative error. I'm attaching a screen capture. Clicking "Retry" crashes with the "OpenXcom has stopped working" popup. Either of the other options just closes the game.
There is no research going on at the time. In fact, there's nothing going on, no research, no manufacturing, no base facilities being built... I'm just idling in the globalscape.
kkmic mentioned that my savegames wouldn't work with the new version, but I can open them fine. I don't know if that can be a problem in itself, and if I should start a new game from scratch in order to test it, but it can take quite a while to get to April 2001 from a new game.
Thanks again.