There have been many upgrades of Vbulletin (the software that runs this forum). There have been many great changes incorporated over the past few years.
In order to "tweak" the forum and prevent conflicting errors in the database, an UPDATE POST COUNT was ran. You may (or may not see) a decrease in your post count.
I did (my post count dropped).
I apologize for this inconvenience but this was a necessary diagnostic that needed to be run. Thank you for your understanding and support!