CSV export producing different result in preview vs report server

Hey again,

I've inspected a couple of additional reports that we use. These reports aren't necessarily intended for CSV export, but I've nevertheless confirmed that the exported CSV is not always the same when exported from the BIDS previewer when compared to the CSV exported from the Report Server.

I'm wondering if this has to do with the versions of BIDS and SSRS that I'm using. I'll have to ask our DBA -- I know she recently did an SSRS update to the SQL server instance that's running our Report Server. No one had noticed this kind of thing before.

Thanks for any input or observations you might have!