"M n" ... wouldn't that give like "Jan 01"(as Jan is month 1) ? ... shouldn't it be "M d" to get the current day of the month?
either way ... I copy and pasted your string "g:i a, M n, Y" and it worked on my 1.2.6 forum ... could be php settings (version) and/or your webserver that also interfer ...
Crap, you're right. I changed it to "M j, Y," ... and it's working (for now). I'll see what happens when a new post comes along. I wonder if the month/month syntax was messing things up.
Thanks for your time... sorry about that.