MSFTESQL-Exchange errors after Update Rollup 4 for Ex2010 SP2

Hi,

I applied Update Rollup 4 for Ex2010 SP2 three days ago, and since then I've been having the following error messages:

Event 4999:

Watson report about to be sent for process id: 14116, with parameters: E12, c-RTL-AMD64, 14.02.0297.000, ExMSFTE, M.E.Search.ExSearch, M.E.S.Crash.CrashNow, M.E.Common.FailFastException, 678e, 14.02.0318.001.
ErrorReportingEnabled: False

---

Event 64772:

The filter daemon process MSFTEFD exited unexpectedly. Here is the stack trace:

Event 1503:

The system exception c000010a was raised at 000007FEF9B60F16. Stack: 

These errors are coming up a couple of times an hour.

I thought it might be something to do with corrupt DB catalog files for searching, so I used the ResetSearchIndex.ps1 script to reset them, but this hasn't fixed anything.

Any ideas what to do next?

Thanks,

Adam