Weird thread issue

[Nordinho]

Heya,

A mod reported to me that she's unable to reach some threads. She just gets the page can't be displayed error allthough the url is right. I checked it logging in using her account, and indeed it happens. There are some fixed threads she can't access and some are random. If she logs out, she can access those threads, so it seems like a usergroup issue, but other mods who are in the same usergroup don't have that issue. It's pretty weird, but does anyone know how to solve this??