Wait for the RTM or Full Version to go live...
If you still insist on using a daily/interim build then I'd suggest maybe going back to build 7229 as things seemed to work fine for you in that build.. There's really not that big of a difference between 7229 and 7264 so it's not like you'd be missing out on anything by going back to build 7229..
Though you would have to do a clean install which of course means you'd also have to reinstall your apps but you'll have to do that anyway when the Retail goes live if you plan on installing it..