Wonderful. I recompiled the MSDN Documenter as well with a fix using a temporary path in the temp folder rather than the the application path - all's been well since.
For those interested - the contention problem, at least this one, is on line 166 of MSDNDocument.cs
Original Message Follows--
David,
We’ve implemented a fix for this
problem which should allow multiple instances of NDoc to operate concurrently
without contention.
This fix will be part of the 1.3 version
of NDoc (which will be going to beta soon).
Realizing that you may be reluctant to
install pre-rele