Starting December 7, if firefox has OCSP enabled, it gives an error when trying to log in to eBay or Paypal (or, I think, any Verisign site), thus:
Error trying to validate certificate from ... using OCSP - corrupted or unknown response. Error code -9073.
This is a new problem as of that date, and does not depend on the system or the firefox version: I see it on amd64/Mon Dec 4 13:55:30 2006 >>> www-client/mozilla-firefox-2.0-r2 and on sparc/Mon Nov 13 18:00:35 2006 >>> www-client/mozilla-firefox-184.108.40.206 for example.
On December 6, everything was working as expected, so I suspect that either Verisign or eBay has changed something, but I have no way of pursuing that route.
Sorry for the lack of detail; I have reported everything I know at this point.
This should have been fixed in 220.127.116.11 ... If you could test would be appreciated.
Please reopen if you get around to testing it, though I think it's upstream regardless.
Initial tests check as fixed. I'll play with it for a day or so then let you know for sure, but it looks like Jory's right at this point.
I'm now sure Anarchy was correct in saying that this is fixed in mozilla-firefox-18.104.22.168 --- at least, nothing that was failing with OCSP now fails. (I have been running with the "Use OCSP to validate only ..." option ever since I saw the test request, and sites like eBay or PayPal no linger give grief.)
So far as I am concerned, you may mark this "CLOSED", but I don't know who else if anyone is testing.