I have mid 2010 MBP (2.53 ghz i5) that has been acting up for the past few months. I think it started when I upgraded to Lion back at the end of last summer. Problems I am encountering are an excessive number of freeze ups and I have to forcefull restart by keeping the power button pressed down. These are complete lockouts, no spinning beach ball or anything. Other times I do get the spinning beach ball, most notably with safari and I will have to force quit safari and restart. One really odd thing is that a folder I have on my desk top that contained miscellaneous items, has had everything mysteriously convert to an alias...pictures, files, etc. everything is now an alias, and not only that but there are multiple aliases for each item. I cannot find the original item anywhere, even a time machine restore does not help. Now, when I installed Lion I just did the install as part of a normal update, but when had problems I later went back and wiped my HD clean and did a fresh install. I have also performed a disk repair on preferences and that has not helped. Any ideas whats going on ?? Before Lion I had no problems at all.