Proxy settings at work

I've searched for an answer but I can't seem to come up with one on this topic. My problem is at work when I start iTunes, I get asked for my proxy user name and password a significant number of times. So many times that it's not worth trying to access the music store so I have to cancel out. Normally when I start Safari I might get asked once, then everything works fine while I'm using Safari. iTunes seems to be where the biggest issue is. This used to work fine but a few updates ago I started to have this problem. A friend of mine is still on an older version of OS X and does not have this issue at work. Maybe an OS X issue? Any thoughts? Thanks in advance.

I spent 2 hrs this morning trying to get this working. Nothing worked but here's an outline of what i DID try...
1) Upgraded to 6.0.3, like you said, this didn't work for me either.
2) Removed Library->Preferences content for iTunes and basically removed all iTunes related files. Ran iTunes which opened like a first install, still didn't work.
3) Tried running the software under a newly created user account. This did not work. Also this new user account used a different username/password for the proxy, so there's no way it is a problem with proxy authentication, Safari works.
4) I removed all package install receipts from /Library/Receipts for iTunes (iTunesX.pkg, etc) and after each time installed a different version of iTunes.
I tried 4.7.1 - 6.0.3 and all exhibited the same problem of deleting my keychain entry for the proxy server.
Summary
I believe this is a problem with the operating system itself. This happened with 10.4.5 and 10.4.4 and I don't have a previous version to test. It may be something iTunes 6 did to the OS, I'm not sure, but Windows is looking better and better to me every moment.
PowerMac G5 OS 10.4.5 Dual 2.5 GHz, 1GB RAM

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Quick update. Added to a previously filed bug. Looks like it's assigned now so maybe we'll see a fix for this soon.
https://bugzilla.mozilla.org/show_bug.cgi?id=563169

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Message was edited by: Caledai

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Hi. I m Rai Singh using Nokia 5800 XM. I sucessfully installed fringSymbian94.sis , no probs But i m unable to connect via gprs. I m using idea gors service (NOP99).
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Moderator note: Personal contact details removed
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*https://support.mozilla.org/kb/Updating+Firefox
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Message was edited by: Bugfixer

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[https://support.mozilla.org/en-US/kb/Options%20window Options]

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