I had read that a Firefox extension called "LJHook" was implicated in weird behaviour (random userpics when the user wasn't expecting that, for example).
A quick Google didn't turn up anything likely-looking on the first page, but what I found amusing was the message, "Did you mean: ljhooker?"
no subject
Date: Friday, 6 May 2005 11:30 (UTC)LJ Hooker
Date: Friday, 6 May 2005 12:40 (UTC)And I thought it would be... well, an LJ hooker :p
Re: LJ Hooker
Date: Friday, 6 May 2005 12:57 (UTC)But I'd definitely skip them for something a little more lj-friendly. :)
no subject
Date: Friday, 6 May 2005 13:05 (UTC)ljhooker
Date: Friday, 6 May 2005 13:23 (UTC)no subject
Date: Friday, 6 May 2005 13:32 (UTC)Up here in NW Ohio, I hadn't heard of them til just now and went to look them up.