also using Firefox 3.6.3 and did not have that problem. I would not trust it if there was a red exclamation point, Perhaps it was a glitch. I would try it again and if it happens again, double click on the lock and copy the information off the popup and report it to PayPal support and see what they say.
I wanted to purchase an item on Ebay. I filled in all the info. while noticing that the URL had the https and the yellow lock at the bottom right side of the screen. But when I went to the Paypal page to put in my password the yellow lock had a red exclamation mark there. This has never happened before. Is this secure?
Fire fox 3.6.3