In fact I was wrong. Heh, when activated the K2 theme the things gone back problematic. In fact the whole headache is coming from the prototype. When K2 theme is activated it replaces the HTML header and makes the link to prototype.js to points the version coming with K2 theme. The one coming with WP2.1 is prototype 1.5.0_rc0 the one w/ K2 is 1.5.0
Dunno what’s the “Big” difference in the file, but with DEFAULT theme it works okay for me, and of course when using DEFAULT prototype.js.So, this post could help in some case, but in mine (where can’t administrate categories/delete posts) – it’s a no-no!
