I had that problem too, with the collapsed rocks, on [COLOR=purple]http://www.elderscrolls.com/downloads/updates_patches.htm
you can download the patch, cause it's a bug and that patch fixes that problem, but it's the BLOODMOON PATCH not the tribunal patch, rarely... it seems they fixed it in the bloodmoon patch, so you've got to download that one... I did it, and it did work
if you don't want to downlaod this patch (it's safe and virusfree), you can also use the console, click the collapsed rocks and type 'disable'

good luck

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morrowind, the game of glory, the game of magic!