I recently updated to 2.6.1 (using mac OS 10.10.1). When I'm in print composer, and I try to save my map (or open a new file, or do anything that brings up a finder window), the window disappears before I can select anything. Which means I can't save any files. I've checked to make sure it's not just popping up behind other windows, and as far as I can tell, its' not.
I've tried redownloading and installing GDAL and Matplotlib just in case. I've restarted (both QGIS and the computer).