I am using QuickBooks Enterprise Desktop (quite similar to Pro). The icon bar was only viewable on left pane. When I wanted to view it on the top pane, all icons were blank. You could tell the icons were supposed to be in that blank area, but nothing was shown. This may sound dumb, but I right-clicked in the blank area, clicked "Customize Icon Bar" and went to the "show icon bar display options" section. For some reason when I switched my choice from "show icons or text" to "show icons only" then back again, the icon bar reappeared. Hope someone will find this useful. I know how QuickBooks can get weird sometimes.
