Attention: Significant side effects in OCAF/XDE 6.6.0

This can be important enough - I had to spend a few hours analyzing and resolving this issue, while porting to 6.6.0.
Hence this repost of the blog post here on the forum. See more details in http://opencascade.blogspot.com/2013/06/significant-side-effects-in-ocaf...

Would be good to have follow up from OCC as requested in the post.

HTH.
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