There's always the chance that an active program that stores data on the card will be writing to the card when you remove it. The best practice is to turn off the tablet before removal. That said, the risk is relatively low and repair very easy if the card is damaged in this way as long as you don't freak out and format the card. My method is to put the card in a reader of a windows computer and run this:
chkdsk /X /F <SD card drive letter>
My wife is very poor at remembering to eject or to turn off card access with her Epic and frequently corrupts the card. The fix takes about a minute.
, follow them and prosper!
Did you forget to kiss a Mod today?