Terminal (spurious command line) problem

[Alan Fry]

A weird problem with Terminal.app has arisen in which a command line  
(of the form <perl file1.plx file2.txt> )gets written to the Terminal  
window each time a new Terminal window is opened (File->New Shell).

The problem seems to owe its origins to some experiments with  
"ScriptGUI" to see if that app would create a 'droplet' to fulfil the  
function of the command line above. Somehow a file (?) seems to have  
got left somewhere (?) in the bowels of system which is 'read' by  
Terminal each time a new window is opened. "ScriptGUI" itself has  
subsequently been deleted.

Can anyone suggest where to look for such a file? Where could any  
'command string' be kept in the system which would be 'written' to  
the Terminal window on launch?

The machine BTW is a G4 running Tiger 10.4.6. and for what it's  
worth, both of the files referenced in the spurious command line have  
been deleted.

I would be deeply grateful to anyone for some clues as to where to  
look or what to do to mitigate the nuisance (and apologise if this is  
too far off-topic for this list).

Alan Fry