I was hoping that this was a problem with early batches only, but having just acquired a Surface Pro last week, I found the same problem when I removed my Touch Cover for the first time: the strip covering the magnets at the bottom of the Surface Pro became detached and buckled. It's rather disappointing that this problem still exists. I guess it's my chance to find out how good MSFT support is.
From the UK - I spoke to MSFT support this morning and they are sending out a replacement. So far, support has been helpful and quick to respond. Apparently, the magnet problem still exists but it is extremely rare. I guess I'll feel much more reassured if the replacement manages to last for longer than a week.