Is the new client broken?

[Zojha]

Could be caused by the recent Nvidia graphic card update or the update itself.

My money is on the latter - I am having a similar issue with a Radeon card. I think it's just the hotfix jumbling something - it stopped from one day to the other with that being the only change. A bunch of other people already reported in in the Technical Issue forums as well, so... fingers crossed?