Report bugs to <bug-solfege@gnu.org>. If you are running Debian, you can use the debian bug tracking system. Don't use the bug tracking system on Sourceforge. General questions and patches should be sent to <solfege-devel@lists.sourceforge.net>.
Please make your bug reports detailed. "I get an error message in a window when I try to start the program." is not usable to me. When reporting bugs:
Tell me what version of Solfege your run. Please check if a newer release is available. If you only want to run stable releases, then you don't have to test newer development releases.
What operating system are you running? Version?
Send an exact copy of the error messages, it makes sense to me even if you think it is rubbish.