I am having the same problem now. But I am experiencing this on a windows Server 2003, with IE 6. I tried to upgrade to 7, with no luck. I now realise there was no point of upgrading. Have deleted IE7 now. I can see the xml's perfect on Firefox, and even from another server (running win 2000 server).
I have tried to register all dll's over again, installed MSXML 4, but no changes.

The error is that several of the lines are missing. I get the top and the bottom, but missing the middle on some. Some present strange characters.
It is also changing the presentation when you refresh.

I have started thinking that it might have something to do with charactersetting. But the xml is using iso-8859-1.

Noone I work with have seen this problem before, and I am kind of running out of time for this customer.

Thanks for any tips