Polygon has verified the Pokemon X/Y 1.1 update's availability and that it requires 229 blocks of free memory. The update removes a glitch that was locking up files if players saved their game while in the outer ring of Lumiose City. The update will restore save files that have already been corrupted by the glitch.
The update also fixes a GTS bug that would cause the game to crash while attempting to trade Pokemon found through filtering methods. The patch is listed as an available update in the 3DS eShop on logging in and should auto-install itself.
Check out our thoughts on Pokemon X and Y in our review here.