I upgraded my WordPress to 3.1, and I have a few problems, after upgrade.
First of them is a featured image, I don't see option, which in I can add image, when I'm editing posts or page.
Second, my images does not resize after upload, I uploaded image with 400x400 dimensions, and I set, that medium size has 300x300. I can't use medium size in my post, because WordPress didn't do that. (maybe I haven't some php package?) // OK, I solved this problem, I didn't have php5-gd library.
Next thing, is format in edit post, I installed new WordPress, and there I have this option, but in my upgraded WP, I don't have. I mean Format: Standard, A-side, Gallery.
Anyone can helps?