I upgraded to Social 2.6 today, and checked a few posts to make sure things were working correctly. The strange thing is, every single comment posted is showing "9 hours ago" or "5 hours ago" etc. no matter how long ago the comment was posted.
Example: Comments on this post range from 2 years old at the oldest to a week or two for the most recent. Every last one of them shows up as being less than 24 hours old.
As near as I can tell, the fuzzy date function is stripping out everything past hours and minutes before making the comparison, so if it's 3pm, a comment made at 8am three years ago is showing as only 7 hours old.
(Of course, I'd rather turn fuzzy dates off entirely since I use a caching plugin, but there doesn't seem to be a way to do that in the options.)