I've made a few changes to the friends feed thanks to suggestions from the forums.
You can now collapse the Achievement Summaries even if someone has commented on one of the achievements, and there will be an icon to let you know that there are comments within the summary.
Also, if you receive a comment on an item that is no longer in your friend feed, it will pluck it from the archive to show you when you click the link in the email.
I've also fixed the graphs on the stats pages, the filters now work correctly and the axes should be scaled a little better.
And finally an update on the 2nd server - the RAM was finally delivered yesterday which means I should hopefully be able to drive it up to the hosting company this weekend, ready for a change over some time next week - more details when I have them.