Hi.

I have the same problem, and I send it for 3 times at Nokia care.

First time: 2 days, simply reflashed (I can do it at my home). Time to corrupted again: 3 hours.

Second time: one week, somethink like "repaired bad isolate contact" (sound like, simply reflashed). Time to corrupted again: 2 hours.

Third time: one week, the Care say "this phone have the memory corrupted, and warranty not availabe. 80 Eur or go home". I say, I know is corrupted, is this the problem, the phone corrupt the memory. Finally I don't like pay and I have the phone at home.

Now is working fine 3 days, but again corrupt the memory.

Reestart and go fine, open calendar and add a new event, select "all day" and crash. The memory change to "readonly" or "memory corrupted", because sometimes not corrupted, but yes readonly.

It's fantastic.

Sorry for my bad english.