I'm doing a quick conventional start campaign, just to see how things have changed.
On the industry tab, I started out building an academy at 100%, until I had researched TN technology. At that point I paused the academy tasked and queued two conversion tasks at 50% each - one for industry and one for mines. The screen is refusing to activate these tasks, even after 3 5-day updates. For the first, I only had the academy task paused. For the second, I had modified its percent to zero. For the third (and possibly the second) I had toggled the paused button twice on the queued tasks, which put it into a "no" state - the update pushed it back to "queued".
[LATER] Ok - I deleted the queued tasks and re-added them. That worked, but it would leave things messed up if they had been partially completed.
John
PS - Are you planning to put out 4.8 within the next couple of days, or is it going to be a while? I don't want to go too far down a 4.7x campaign if 4.8 is about to come out....