"User Information: 

Just upgraded to Scientific Linux 6.2. Tried to open some old files e.g. May.grdb and got the error.

Error Details: 

67099: ERROR: gramps.py: line 148: Unhandled exception
Traceback (most recent call last):
  File "/usr/share/gramps/ViewManager.py", line 891, in open_activate
    (filename,filetype) = self.db_loader.open_file()
  File "/usr/share/gramps/DbLoader.py", line 114, in open_file
  File "/usr/share/gramps/DbLoader.py", line 465, in read_file
    _("Could not open file: %s") % filename, msg )
  File "/usr/share/gramps/QuestionDialog.py", line 174, in __init__
TypeError: GtkMessageDialog.format_secondary_markup() argument 1 must be string or None, not exceptions.AttributeError

System Information: 

Python version: 2.6.6 (r266:84292, Jun 18 2012, 09:59:14) [GCC 4.4.6 20110731 (Red Hat 4.4.6-3)] 
BSDDB version: 4.7.3 
Gramps version: 2.2.8-0.SVNexported 
LANG: en_US.utf8
OS: Linux
Distribution: 2.6.32-279.1.1.el6.i686