Explorer Property Page "Last modified" stays empty

By @mrtux on May 02, 2014 01:25 (imported from Google Code)

---

What steps will reproduce the problem?

1. Open explorer
2. Go to TGit repo src
3. Open Explorer Properties on Tortoisegit.sln
4. Go to git tab

What is the expected output?
See the commit sha1 of the last commit where this file got modified
OR
an error message

What do you see instead?
Empty space.

Please use labels and text to provide additional information.
Last working version 1.8.6.0, not working with 1.8.7.0, 1.8.8.0 and master (revision 87d98011).