Forum search bug

When I try to use the forum search when I try to open the second page of results I get the following error:

Tested with IE9, Opera and Firefox. All give the same error message.

Agreed, has been happening for quite some time. The regular (built-in) forum search still works, though. There are another two posts on the same problem, and one includes a possible workaround:

[url]Broken search?]
[url]Forum search button broken]