We’ve been getting that question a lot this week!
Here is the answer
The new version of Firefox (version 19) includes its own PDF viewer. So your checks are now showing in that instead of Adobe Reader like they normally would.
If you’re using another browser such as Safari, Chrome, or Internet Explorer you can just disregard this whole thing.
If you are using FireFox, we have instructions for switching back to Adobe Reader so you can go back to printing checks, labels, and reports happily in IconCMO.
How to disable the FireFox PDF Viewer
Open a new window or tab in FireFox (you don’t have to be logged into IconCMO)
Type the about:config into the URL address bar
Hit the Enter key or click the arrow to go to the address
Search for PDFJS
Double click on pdfjs.disabled
The value next to pdfjs.disabled will change from false to true
Under the Tools menu, select Options
Click on the Applications tab
Note for Mac users: Applications will be under Firefox: Preferences instead of Tools: Options
Change the Adobe Acrobat Document to Adobe Reader
Change the Adobe Acrobat Forms Document to Adobe Reader
And you’re done!