aneroid's Journal: Possible Bug in Gmail Attachment Download?

When you click on "Download All Images" (or "...All attachments") in an email, if you replace the 'zip' with 'rar' in the URL, I get a "Sever Error" message. I'm wondering if it's really causing a problem or just a way to make lamers think it is? hmm...[aneroid thinks]

URLs:
https://mail.google.com/mail/?view=att& disp=zip&th=<random_numbers>
https://mail.google.com/mail/?view=att&disp= rar&th=<random_numbers>

the error is

Server Error

We're sorry, but Gmail is temporarily unavailable. We're currently working to fix the problem -- please try logging in to your account in a few minutes.

Reporting it...just in case.