So we had some hiccups to get our optimized notification code out. It should be working for you all again. And it is super fast!

 Most common problems why we drop your notifications:

• your message content is longer than 150 characters. Note that some MySpace users have very long names. So check before sending your message.
• Invalid html (no clossing tag, etc) That's you Poker Palace ;)

Both issues appear to be caused by users with longer display names.  The long display names can cause the invalid HTML, because the closing tags get pushed outside of the 150 characters.

I'd recommend capping the length of the display name before adding it to the content.