Ultimate Branding Text Change Stops Working

This is more of a usability comment than a question, since I didn't find this covered anywhere in the user guides.

When using Ultimate Branding to replace some text, I tried to change the text to see your affiliate information. on the front end to or register an account at http://example.com/wp-login.php?action=register to see your affiliate information.

This caused all of the text replacements to stop working. I am guessing it has to do with one of the special characters in the URL. I don't know which character is causing it, although I am using the /in another text change and it works correctly. Possibly the : ? or = or even the two simultaneous //?