OK, after a certain period of testing I have to renew my recommendation:
Do not upgrade to Mac OS X Lion
(unless a significant update is released)!
Lion is simply not ready for daily use. The reason I am saying this is mainly the “Lion won’t remember preferences” bug which also leads to the “The Finder in Lion won’t keep icons in their place” bug.
I suspect both symptoms are related to a bug in Lion’s new Autosave and Versions features. I don’t know and frankly I don’t care. Autosave and Versions are not too useful in the first place. But first and foremost a bug like not saving preferences is just unforgivable, and it continues to persist after the 10.7.1 update and there is no remedy in sight. I will try to stick to Lion because I already use full disk encryption (and even that does not work an all drives) and I am not willing to reformat. But it is not an easy task.
Update:
Mac OS X 10.7.2 seems to have removed the bugs mentioned.
