I looked when you mentioned it, and it seemed like Paypal was fine, but that your site's SSL-support had expired, is all. Since the processed of $ as you are using Paypal takes place on Paypal's domain, I wouldn't have let that bother me, personally. Cheers!
Interesting - didn't do that to me, but perhaps because I've got JS setup to be opt-in via noscript and ghostery etc. Either way, sounds like you have it sorted now.