I'm having a strange issue with my new N800.

I have 2 2GB miniSD cards, one in the internal slot, and one in the external slot. Occasionally, the internal card will not longer be recognized by the N800, as though the card wasn't there.

At first I thought the card wasn't seated properly, so I removed and reinserted and while the card started working again after a couple days I noticed it had quit again. I swapped the cards and the problem stays in the internal slot. This morning it happened and I rebooted the device without touching the card and it started working after reboot.

Any ideas? Is this a known problem? Is it time to call Nokia?

Thanks.