This actually caused some problems with install, since angular-password-strength claims to only work with Angular 1.0.8, and we're using 1.2.  I changed the comparison in their bower.json and submitted that change back to them: https://github.com/Venturocket/angular-password-strength/pull/2

Until that's accepted, we'll have to point this at my changed branch: https://github.com/curtislacy/angular-password-strength/tree/Caret-Operator

I'll fix it when I merge.