Yes, just discovered it this morning. I can seem to crop any other aspect ratio, but if I try 1:1 it crashes and when I re-open it tells me that the Metadata is out of sync.
I have discovered that on my older iMac that if I turn off the GPU support not only does it no longer crash on 1:1 crops, but it is much faster when using anything in the Develop Module.
I've been reading more that the GPU support does little on older Macs I'll turn it off and see what happens. thanks Scott