Hello Karen,
We have had a report of a similar problem with Views that have filters causing V8.1 to crash. We have re-created the problem with the sample data, and it has been referred to R&D to try and figure out what is going on. At the original site that reported the problem, we found that re-creating the Filter solved the problem. While this is not an optimal solution, it did allow them to get the Views they needed running.
BTW - it would be sufficient to copy the Filter to Notepad and paste the text into the Filter box when the new version is installed.
Sorry for the inconvenience.
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Andrew Bates