Problem starting codeblocks with non-source code file

[sizzzzlerz]

I'm using codeblocks 8.02 that I built from source on a Redhat 5.4 linux machine. When I attempt to open any file except existing source code files (.c, .cpp, .h), the editor opens up to a blank window. This happens with shell scripts (.sh), text files (.txt), and files without extensions (makefile). Even starting up the program with a new source file that I wish to create does this.

I tried going to Settings->File extension handling to add a couple of extensions and setting codeblocks as the program used to open them. It doesn't seem to do anything.

Am I missing something here?