Hi.
Are you having the same problem?
I have installed the last QT update and 10.2.5 update.
When i try to open more than 1 clip it gets somehow jerky and unstable, and when 2 or more are opened the finder get stalled; i mean, i need to relauch finder and kill QT to recover functionality. In other occasions i just get the color spinning ball when QT clip is opened.
Cheers!