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This has cause some very odd behavior. Here's the commit: http://drupal.org/cvs?commit=327520
When we're checking it this is a result page, we're actually asking the module to do a search. On top of this being expensive, it means that things like apachesolr_has_searched() suddenly think the user has searched. Even worse, 6.x-1.2 seems to add a link tag to all searches on every page and IE will follow that link tag to opensearch/apachesolr_search and cause this search test to happen. That means, on /every page/ at least 1 search is being mad. Definitely a bad thing.
I don't know what the real fix is. It seems like maybe those links aren't suppose to be on every page? But even so, calling an actually search to see if we're on a result page can't be the right answer. The attach patch removes that code.