Comment 1 for bug 433827

Actually, I'm sorry, it might not be gnome-terminal that has the offending code anymore -- this bug seems to affect apps launched from the panel, too.

In particular, update-manager is now broken. (I was *wondering* why it hadn't popped up since I upgraded...) The error message is uninformative, but I confirmed that it is the same problem by (1) verifying via /proc/$(pidof update-manager)/environ that update-manager had the bad http_proxy variable set, (2) turning off the proxy in Network Proxy Preferences, (3) restarting update-manager (4) confirming that the http_proxy environment variable was gone and that (5) update-manager now worked.

I think that may make this what Debian would call a "critical" bug.