Does anyone know where Safari might hide old security certificates?

Question

In a vein similar to the questions of where Safari is getting the data for the url address autocomplete, does anyone know where Safari might hide an old security certificate? Apple Care could not help me, and the their final suggestion was to reinstall Safari.
Here is the problem: I access my work computer system through Citrix Client software, which as far as I am aware is emulating a key board to run internal applications and displaying on my screen the result. It seems as if I am inside the firewall, but really I am just looking in an open window (I am definitely not an IS person so computer savy people may be cringing at my simplistic view.) In any case, until this fall I used Safari just fine despite the fact that our IS group said that we had to use IE, and of course they do not support Macs so they will not help. Some upgrade led to the expiration of the security certificate that was stored in Keychain. And despite installing the most up to date Citrix Client software, erasing the certificate from Keychain, clearing the Safari history, cache, bookmarks, and even creating a new user, Safari keeps finding the old certificate and an error message appears that says the certificate is out of date. Our IS assures me that the old certificate is gone from wherever in the cyberworld they exist. That is further supported by the fact that I can in fact use IE just fine to access our system from the very same machine. I think the issue is similar to the ever-present url autofill information, and incidently, the autofill at Ask.com. I have noticed that clearing the history/cache/bookmarks and the cookies does not clear the Ask.com autofill with Safari.
Does anyone know where this information might live? Any ideas as to why creating a new user would not solve the problem?
Like others have noted, I would give up on Safari but for use with our Citrix server it provides much better window capabilities than IE. Unfortunately, Apple seems to be of no help since the people who have assisted me on more than one occasion have gone to the Safari product specialists while I have enjoyed their hold-music to no avail.
iMac (intel) iMac (PPC) iBook (PPC)   Mac OS X (10.4.8)  

Answer 1

does anyone know what the difference is
The system battery runs the whole computer when it isn't plugged in. The backup battery only preserves PRAM.
before i risk wiping my 'ram disk' whatever that is
If you don't know what a RAM disk is, you don't have one to wipe. This feature enables some of the computer's RAM to be used as if it was a storage drive; it's part of Mac OS 9, but not Mac OS X without using third-party software.
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