These are not really 'problems' more observations or 'features' I do or don't like therefore, Mr Moderator, please feel free to move it somewhere more appropriate if necessary.
I have only installed Lion onto my MBP so far and not my iMac.
1. In iCal the birthday colour has changed to grey and it is as far as I am aware not changeable anymore.
2. Resumé is either all on or all off, it is not selectable between apps.
- So if you are working on a document over a period of time it's great. But, if it's a quick change and you CMD-Q next time you start the app it opens that last document and not a choice of a blank one.
- Safari does the same, whatever windows / tabs you had open are remembered.
Therefore, if you wish to start from a standard point every time in your apps (google homepage / blank document) you now have to close every window / tab before you CMD-Q.
3. I'm really not keen on the colours within the Address Book and iCal now, I much prefer the grey it was and not the 'brown' they are using to implicate the 'leather look'.
4. The 'bounce' button / feature seems to have been removed from the mail app
- I found this very useful with spam email etc
5. I do like the speed of the new Safari, it does seem a lot more 'snappy'.
That's it so far I'm sure more will appear as I use it a little more.