not a known beta issue… based on this and your other tickets, indicates you likely have some js conflcts or issues…

link to site??

http://manuelmarino.com/forum

thanks a lot! it’s a pity if I can’t solve these issues

well, you have at least one js error on your site…  something to do with UIConfig…  seems to be coming from gigya social services or something like that…

also, have properly told wp super cache to not cache the forum page?

yes, I put /forum/ and also clicked to avoid “pages”, to be sure.

I made also an experiment I do when I have problems. I rename all the plugins except the one I want to study. In this case your forum software.

The problem remained. So I renamed again all the plugins, of course, and trying to understand what’s wrong. Ah, something I noticed here as well: in the editor, lines of text are double spaced by default. Many of my users complained about this. Maybe there’s an option to solve it?

About js errors, any other ideas? 

okay, cool on the super cache… just wanted to be sure…

as to double spacing (have not looked) but we dont do that… are you sure its double spacing? or do you have large margins/padding on p tags?  p tags being html paragraphs…  if you have empty p tags then its likely your users hitting return twice… in a wysiwyg editor, you only hit return once for a new paragraph…

do you use something call gigya??

you could try a temp switch to the wp default theme and see if that clears it up to narrow it down…

you are right!! it’s the theme! on twenty eleven theme it works perfectly! also the resize buttons.

Ok… what should I do now? can I copy parts of twenty eleven and include in my theme, and exactly, what?

I’ve used style.css of twentyeleven in my template, but the problem remains, so it’s not a css problem.

good hunting! and nice job… didnt notice that when I looked at your site… thanks for the update.