Same here, happened before update for me but was a much rarer occurrence. (Experimental)

Edit: Realised my GPU (AMD HD 7800) drivers are not up to date, will update and see if issue persists)

Edit 2: No longer freezes when spawning in with drivers updated. Freezes tend to be shorter until I get a freeze that it does not seem to recover from. Uploaded dxdiag.

http://feedback.dayzgame.com/view.php?id=14031

Earlier report of the same issue.