Care should be taken to test across multiple platforms (especially mobile!) when using SSL configurations other than the classic 1-domain, 1-ip, 1-server setup.

Care should be taken to test across multiple platforms (especially mobile!) when using SSL configurations other than the classic 1-domain, 1-ip, 1-server setup. The problems with SNI have already been discussed here, but we've also found issues with older Android browsers getting certificate warnings when using UC certificates. Specifically, there are issues when using a wildcard UC certificate (so one can have both https://root.tld https://root.tld and https://anyvar.root.tld https://anyvar.root.tld) on Android OS's prior to 2.0. Also, if you use StartSSL, be sure to configure the intermediate CA (in addition to a root CA) in your server's config. Again, this was an issue where most desktop browsers worked fine, but a handful of mobile browsers failed or had extended load times.