[otrs] Syntax error in Config.pm?

I'm having a problem that's almost surely pilot error, but I'm at a bit of a loss. I'm getting the error: syntax error at /usr/home/otrs/gateway/OpenTRS/bin/cgi-bin/../../Kernel/Config.pm line 539, near "$_;" That line being $Self->$_; which is in LoadSubConfig. I diffed my Config.pm against the the original v1.67 of Config.pm, and I can't see anything obvious. Any ideas?