Zedim

I removed Fences and the problem has gone away.

If I try to change the extension of a file on the desktop, Windows displays a warning dialog (as expected). However, with Fences installed, the dialog appears briefly (fraction of a second) and then gets placed behind/under any open windows (i.e., bottom of the z-order). Attempting to bring it to the foreground (by clicking on the title of the dialog) caused the dialog to again be moved to underneath. This seems to happen other dialogs related to the desktop (for example,