We just upgraded to SW2013, and I noticed a "problem" when opening an assembly. When I opened up this assembly, 4 other part files contained within the assembly just decided to open themselves (I had 5 windows open after on File<open). Even stranger, 2 of them are suppressed and should not be used in the model. My coworker also had the same problem, but with different parts. The two of us are working on the same base model, so it looks like it's related to that assembly, because other ones I have opened do not have this problem.
Any ideas what's going on? I don't recal this ever happening in 2012.