Hi Frog,
I'm using the SEARCH (in capital letters, above forum), as opposed to 'Search function' at end of the forum address/location string.
I certainly wouldn't put it past IE to be having a fit, though this is the only forum/webpage I've run in to the issue. Happened half a dozen consecutive times earlier today.
I'm not terribly fussed. Just thought I'd mention it incase there was a gremlin in the system.
Cheers,
John