sorry, but you did not select any posts to perform inline moderation on

[Matt]

I'm having this same problem. I updated my forum from 1.8.7 to 1.8.9 yesterday and am now unable to use inline moderation to either delete posts or move threads.

My url is http://method-rpg.net

I did update the headerinclude template, but that didn't change anything.

You haven't got the general.js change. All the changes in the thread need to be applied. Alternatively, upgrade to 1.8.10 as this should push the change through, as long as you check for updated templates.