At the moment, there are partly reproducable crashes/lockups/slowdowns with the bubble popping and sheep games, i've found about 30-50% of the time playing the bubble popping game I can get anywhere from 30-90 seconds in to it then itll start slowing down, initially with bubbles just taking a second or two longer than normal to fully slide up but eventually with the device stalling completely for 20-30 seconds, with about that kind of timeframe between menu changes attempting to exit the program.
Info (from myself and others) is also on the package's testing page comments, at:

http://maemo.org/packages/package_in...inparty/0.5-2/

It's a really great game and would be ace to see this in extras, it will be a horrible shame to see the slowdowns remain and prevent it getting promoted for end-user use.