Another day, another report [:)]

So I can trigger this in two ways, but sometimes the middle click pan just stops working.
1) The reliable way is to open SH3D, place a cube and test. Pan works. Then display the 3D view in a separate window. Pan no longer works.
2) The unreliable way is to just use SH3D for a while. Even without separating the window, something occasionally causes the pan feature to stop working.

I check the redirected log, and there are no exceptions or errors in the few lines in there.