Starting today - March 24 - when attempting to install our app to a shopify store - On windows (IE 11.0.4 and Chrome Version 33.0.1750.154 m), instead of the "You're about to install <name of our app>" window appearing, the navigation is interrupted and the browser displays:
"Navigation to webpage was canceled" - "What you can try - Refresh page" - "Do you want to open or save this file?" with authorize.json file offered in Open/Save/Cancel file dialog.
Selecting Cancel, and refreshing the page will bring up the correct window to install our app.
https://www.dropbox.com/s/56m1qe68ik8plcc/Screenshot%202014-03-24%2013.38.50.png
Is this a new problem with Shopify? This problem doesn't occur on the Mac plaform - only on windows.