Safari can't connect to https Safari suddenly can't connect to any HTTPS site because it "can't establish a secure connection".

This is on an administrator account, not a managed account.

A different administrator account is able to use Safari with HTTPS, so must be something specific to my account, but I have no idea what.

Google Chrome has no problems connecting to HTTPS sites.

Things I have tried:


emptied Safari's cache
deleted Safari's preferences
reset Safari entirely
repaired Keychain (no errors found)
deleted Keychain (didn't help)
repaired permissions in Disk Utility
rebooted
hoped it would suddenly fix itself


All of the google results I saw suggested either repairing the Keychain (which I tried and which did not help) or were only applicable if there were "Parental Controls" involved, which doesn't apply here.

If I had to guess, I would think that wherever Safari is checking for "certificates" is somehow corrupted, but I could be wrong. I'm not even sure where to look for those - maybe ~/Library/?
A report on forums.macrumors.com seems to be fairly similar to yours. This happens as well in Safari 5.1 and is very recent.

The solution was to delete:

~/Library/Preferences/com.apple.security.plist