I recently bought a 256mb card for my 6630, but now i have lost access to the gallery function, so I have to go round the houses the access everything in that menu.

Anyone had a similar problem?

It's not that i can't use it, just wondered why it stops the galley menu working if you put a bigger card in :confused:

As long as your card is a RS DV MMC card (it's the DV bit that was certainly important when these first came out as there were very few on the market) then it should work just fine.
When I had a 6630 it used to do all kinds of strange things - it may need a hard reset - type *#7370# Note that that will wipe any data you've got on the phone and put it back to how it left the factory.