I've come across two "issues" in WP2.5:
1) WP is saving a draft for each post which I have to delete after I've posted.
2) Every time I add two different pictures using custom fields, then it only remembers one of the pictures. I'll have to go back and add the first picture again - and then everything is allright.
Apart from this, I only give 2.5 he thumbs up, including image management, tags and overall navigation - good work!
Reinar (on behalft of F1 Racing DK)