Hi!
I was running SlickEdit with the paged heap (electric fence / debug heap) option set in gflags (ships with windbg). While jumping to a symbol using the Ctrl-. combination followed by a selection dialog, I ended up in windbg after selecting where to do (after hitting enter). It looks like an access after free somewhere in vsapi.dll.
I've attached a zipped down minidump in hope that you might fix this bug (full dump is available upon request).
-- bird