LittleBigPlanet's about to be upgraded to v1.12, as you can see on the PS Blog, an update SCEA's dubbed the "Cornish Yarg" edition.
We don't know why.
The patch will include several features - such as being able to play your own music in the game off the XMB - and a few fixes.
Hit the link for full details. There's no specific date on it yet.