Hi twanno,
Thanks for the reply.
With issue number 1 I didn't have either of those options set to true--as far as I can tell (neither show up in about:config at all).
As to the second issue, I am running Win XP SP2. The behavior I'm trying to describe is not consistent. But the major issue is that when merging windows, a window other than the last window (that had focus) was merged to.
I even deliberately (to be safe) switch to one window and scroll around a bit (just to ensure its focus is noticed). I then switch to another window, right-click and choose Duplicate Tab-->Merge Windows. But what often happens is another other window is merged instead of the last one that had focus. This other window may not have had the focus for hours--yet it is the one merged for some reason.
Anyway, I have disable AdBlock Plus (and its updater) and will see how things go.
For the record, I believe this issue began before Duplicate Tab 0.7 was released. I can't pin down exactly when it happened, since so many extensions have been updated due to FF 1.5. If I had to take a guess, I would say it was either AdBlock Plus, or SessionSaver when this behavior first began.
As I write this, with AdBlock Plus disabled (and the PC with a fresh reboot) things seem to be working OK with Duplicate Tab. I don't know if this will last, as the behavior I'm experiencing--or hopefully was experiencing--is not consistent. With my luck the odd behavior will return the second I send this message.
Anyway, I wish I could provide more data-points. But I do appreciate your help.
Thanks,
Mike