I thought I had them fixed last night but it turns out not. I've made a few more tweaks and I think they are working now.

To reiterate earlier advice, if you've sent someone a PM in the past 24 hours, they probably did not receive it, since the ID#s in the links in the "you have a PM" emails are incorrect (thus the "invalid" message when clicking on the link).

However, it is *most likely* still in your "sent items" folder of your PMs, and you can click into the message and then forward it on (or cut-n-paste into a new message) to resend.