"main.scpt" run error on startup

Hello,

My new iMac was recently in for service thanks to Apple putting a faulty 1TB Seagate hard drive into it, and now that I have it back, a script error shows up every time I reboot. It tells me that "main.scpt" cannot run because it is set to "run-only" and cannot be edited. From what I understand, main.scpt tells the computer which programs to run on startup. Despite the error, nothing seems to be wrong and my computer runs fine after I close the notifications.

When I try to access the main.scpt file, it tells me that it cannot be opened for the same reasons given above. This doesn't seem to be affecting the performance of my computer, but it is an annoyance.

I am still currently running Snow Leopard - will upgrading to Lion take care of this issue? If not, does anyone have any idea as to how I can make this error message stop appearing?

Thanks