Glad that finally fixed

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I do plan to add logging to all of the inline actions; I do it for a few right now, but I want to add it in for all as well as cleaning up the entire system.
Also in 1.2.1 there will be a small change to the inline_merge_thread template that will set the default title.
Adding a move thread in the merge screen could be a possibility. I'll see about adding that in either 1.2.1 or the next version.
As far as that hack, wherever the hack is storing read information, the table probably needs to be updated to change all the old threadid's to the new ones.