Proxy username and password not remembered in system preferences

I found the solution: in fact in the proxy screen (network settings), the same IP address was stored multiple times on different lines (surprisingly the field is not limited to a single line). Since it was the same IP address, using the up and down arrow didn't show that multiple lines were entered.

I removed everything, pasted the IP a last time, and now it works :)

I have the same issue. When I use a proxy.pac file certain applications fail to pick up the settings. Among these are:

• Firefox
• Chrome
• Java apps (like eclipse)

Some apps that do work with the pac file are:

• Safari
• Skype
• Adium
• Evernote

What I have found though, is that when I manually add a proxy server to the system preferences it is picked up by all applications. So something in the pac handling is broken. Maybe old/new APIs in Lion?