Wot it says. I have the SD card mapped as an extension of the internal memory, and a bunch of apps on it. If I pop the card and re-insert it, it remains visible to the system for an hour or so, but thereafter it disappears.
If I pop the card and stick it in again it reappears, likewise if I reboot without popping the card.
What thinketh the panel - sporadic error in the card or something underhand in Android or the HW?