I found a post on another forum regarding this same problem on an Archos 5. Here's a post that seems to explain a workaround for this problem:
Low memory conditions do crazy things
with Android on the 5A. Poor memory
management yielding: Increased
Response time, Extended Slowdowns,
Freezing, Reboot, and the like.
To make this even worse, the Android
Archos 5 usually gives us no warning.
What to do!?!
Turn on Settings>Sound &
Then you get a "click" each time you
tap a screen selection.
The Warning: Not Hearing the Click
After a Tap
The Action: Wait until you hear the
As Android matures with better memory
management this will go away. Maybe
Google with fix it this year,
especially if Android devices get more
I'd give this a shot and see if you end up seeing this error less frequently. The whole thread makes it sound like these Archos devices have issues with memory management, leading to a crash when the RAM gets full.