i have been getting the exact same problems as kiwinavega for about the same time period in all browsers and all emulators (the latest being snes running in firefox with a fireIE tab [an IE instance in FF]). they will run fine for a while, usually indefinitely as long as it is minimized, but crashes within a 10 minute span of playing time. i also posted my specs in this thread:
http://www.retrouprising.com/support...28/#post259015
kiwi, if you are able to land a support session, maybe we can compare further details that kong specifies?