No, did not see this before. It seems the file
contains some symbol which is not ascii. I can't see anything that could cause that in that file.
Can you compare the file with the official file:http://gramps.svn.sourceforge.net/viewvc/gramps/branches/maintenance/gramps34/src/glade/dbman.glade?revision=20336&view=markup
Change gramps34 into gramps33 in this line for the 3.3.x version.
Did you correctly install? You cannot install globally two versions of gramps, that will cause big problems.
You can only install one at a time, if you want both version, you need to install one locally under your user account.