Can't open multiple files in Ubuntu 10.04

[GoogleCodeExporter]

What steps will reproduce the problem?
1.  Open any text file in Glasscat
2. Attempt to open any other text file, by way of command line or file manager.

What is the expected output? What do you see instead?
The second file should open in its own window. Instead, nothing happens--the 
second command silently exits much as many other programs that activate a 
previous instance, but the second text ifle doesn't open

What version of the product are you using? On what operating system?
Current (Rev18) SVN, compiled by both Vala 0.7.9 and 0.8.0

Original issue reported on code.google.com by [email protected] on 29 Sep 2010 at 3:45