Background images in list are moving when hovering over them in Firefox

[dutchbb]

I made an image thumb gallery in my forum with a unordered list and background images for the list items i.e. thumbs.

The result:

http://forum.dutchbodybuilding.com/ (just under the forum welcome message).

The problem is in Firefox, when you hover over the thumbs, they move to the left or right, making the borders look ugly. This problem doesn't show in IE.

Any clue about why this happens?

Thanks - dutch

[DaveWoods]

Works fine in Firefox for me. I'm on 2.0.0.6.

[Nadia P]

I don't see this problem in Firefox 1.5.x either

Nadia

[dutchbb]

Works fine in Firefox for me. I'm on 2.0.0.6.

You hover over the thumbs with the mouse and they did not move?

Strange

Does the error sound familiar to anyone, and is there a solution?

[DaveWoods]

Yep, I did exactly that and it works fine for me.