drop-down problem in IE

[myforum]

Hi guys,

I`ve done a site for a university project - labm.de - and I was so proud of myself, until.. ye, I tested it in IE6.

Well, the only significant problem so far is that the main manu woun`t show. I`ve looked for possible bugs/hacks on the internet and found something that helped me get the green buttons back (still not precise ). The thing is, I wasn`t able to fight back my under menu. It is still on the other side Sad

I`ve tested it and found out, that the bug is not caused by the PNG-file I use, but it lies on the visability:hidden thing. Apperantly IE has problems understanding it? ? Has anybody had similar problems/experience with such drop-down menus?

#mainmenu ul ul{
position:absolute;
float:left;
display:inline;
visibility:hidden;
}

Is there an apropriate hack, that would help translate the drop-down effect ?

thank you in advance!

P.S. the code for the menu is in default.css under /* Menu */