accumulating terminal profiles

I have a "login item" which runs a short Perl script. It is a *.terminal file simply because I don't know how else to run a script as a login item (ie. there is no input or output). It works well, except for one thing: each time it runs, it creates a new copy of the Terminal profile. By now, I have about a hundred of them :-( This doesn't seem to happen with my other *.terminal files, but there are two key differences and I don't know which one is responsible for the behavior: 1. The others are not login items, I run them manually by double-clicking their icons. 2. The others are bash scripts, not Perl scripts. How can I prevent these new profiles? Again, I'm not married to Terminal - if there is a way to run a script at login time that doesn't involve Terminal, I prefer it. -- Ian