MBA 11": sometimes crashes when waking up from hibernate

Hi,

I have a 11" MBA since november, and am very pleased with it.
Only issue is, it *sometimes* crashes when I try to get it out of hibernate (suspend-to-ram). I use this feature all the time in order to avoid restarting all the applications I use everytime (this saves a lot of time), but sometimes (maybe once in 10 or 20 wake ups --- that is about twice a week), it will not wake up: the screen then stays black, and the machine seems not to react to anything (I did try to wait up to 5 minutes, and it still does nothing). If I press on the "On" button for a long time, it eventually reboots, but then I need to restart all my applications (browsers --open tabs lost--, virtual machine, terminal sessions), which is pretty painful.

Am I alone with this issue ?

If not, is there some solution ?