after a lot of investigation you and Jason are the only people seeing the error you reported, I have had 11 other people look at it now and two report an different error (powerstore.i-cre8.com uses an invalid security certificate.
The certificate is not trusted because the issuer certificate is unknown.
(Error code: sec_error_unknown_issuer)) which seems to be a firefox only issue and everyone else reports it working fine, I have tried to sample people I know who would not have visited a development site on my server and triggered the SSL previously so I am a little bemused
all said and done I think that this needs to be tested in the wild now so to speak to see if this rears it's head or just a peculiarity !
thanks for the time spent with me on this