It looks to have been fixed, Just installed the 3.0 trial from their website.

We have been evaluating a number of wireframing tools for iOS development over the last few weeks.

Having only played for 3.0 for 20mins, along with this stencil > http://www.teehanlax.com/tools/iphone-sketch-app/ (just need them to convert to the new Stencil) its pretty good. Best I have found so far.

I was about to start work with Omnigraffle which we had ended up with, but looks like I will be buying Sketch 3.0 end of today if no problems. We also tried Brief (http://giveabrief.com/) which concept wise is amazing but its not ready for prime time yet.

Photoshop was the other way, but unless you are a PS master just slow workflow.