I'm afraid we're all in the dark on this one but if you read the last couple of updates and do a little reading between the lines it seems like they're close on the new graphics engine but still have some minor bugs to fix.
I'm afraid you'll just have to sit tight for a while longer....on the upside they have finally started posting weekly updates so we can stop spamming F5 every day and check in once a week to see what's going on.
