Windows 7, Chrome.
IOS Lion, Safari and Chrome
Windows XP, internet explorer and Chrome.

Got the problem on each one of them.

Now, maybe this problem is not related, but after the last edit from above, also something else occured.
When I want to change my Icon List text, you usually see ‘List content goes here’ in the textbox below.
But the whole textbox is blank and I can’t edit it. If I click on the box, nothing happends.
The text ‘List content goes here’ is there anyway, cause I see it on my webpage after I save.

Thank you all for your time,

Thank you both for the comments, really appreciate it.
the problem is solved, the lines are vissible as they should.

But….

Now a new problem occurd: the icon’s aren’t rendering as they should/were.
After scrolling, first they become vissible, more slowly than usual, then disappear again, then flikkering until they are vissible again, etc..

I’ve got this problem on several computers.

Any idea’s?