I can't see that problem without registering... Does the site have its own internal support board where you could alert the administrators to this so they can check it out?

There are lots of complaints inthe forum area of this site about the problem with Firefox 4; most suggest disabling all add ons a nd hardware acc; but some people report this makes no difference. Here is one reply

"Damn, this issue is frustrating. Ctrl-r does not fix it and neither does turning hardware acceleration off. I am forced to start up chrome to render this correctly.

zstr wrote: This happens to me when the site is loading extremely slow.

The culprit is the CSS "border-collapse" property.

To fix this get the Stylish add-on and add this style:

CODE: @namespace url(http://www.w3.org/1999/xhtml);

@-moz-document domain( "nzbmatrix.com" ) {

  .nzbtable {
      border-collapse: separate !important;
  }

}

Thanks, this did the trick. "

I'll stick with version 3.6 for the time; until another vesion of Firefox is released.

Thanks for the update. I'm sure the border-collapse behavior was changed to fix some other problem. They must not have anticipated (severe) new side effects.

Firefox's developers generally work on problems added to bugzilla.mozilla.org. There have been some border-related bugs posted recently, including one that refers to speed with border-collapse (Bug 635972 – Painting dashed collapsed borders on large tables is very slow). But I don't know whether that is relevant to your forums. I suppose we'll have to wait and see.