Mouseover preview and Firefox

Why is it that if there is a mouseover preview showing when I click on a link, when I get to the thread I was clicking on, it’s still there in the middle of the page? Only happens with Firefox. Clicking anywhere on the page makes it go away.

Firefox 3.0.5, XP here. For me, the mouseover disappears as soon as I click on the link. If I don’t click and don’t move the cursor, it vanishes in 5 seconds, which is normal behavior AFAIK.

I had this occur one time and I think something was refreshing in Firefox when it occurred. It went away in a few seconds.

Firefox 3.0.5 on XP and Vista here. For me the mouseover stays around for a few seconds after I click the link. It generally doesn’t bother me unless it happens to be covering the OP I am trying to read.