Mountain Lion — Apple Image Capture Disables 'Scan' Button for my Epson Workforce 840 Printer/Scanner

It’s not until one starts using a new operating system version that “smaller” problems start showing up. Which aren’t so small when they totally block your needs to get the job done.

With OS X Mountain Lion, I can no longer scan using the Apple Image Capture application with my Epson Workforce scanner/

Image Capture can preview (Overview) just fine, but the Scan button remains grayed-out and disabled, no matter what settings I choose, as shown below.

Jim S writes with a solution:

Same thing with my older Epson scanner until I either 1) enter a size other than zero, or 2) pick an auto selection option. Doing either activates the scan button.

MPG: Indeed, choosing a non-zero size enables the Scan button.