If the ngAnimate module is included in the app, elements with ng-model directives will lose their inline style definitions on the first change to the model property, IF the element has a class which declares a css transition.

A JSFiddle to demonstrate: http://jsfiddle.net/q54Tj/2/

Expected behavior: inline styles should always be preserved on elements regardless of transition definitions or inclusion of ngAnimate module.

I'm not sure what version of Angular introduced this issue, but I've been running for a while on 1.2.5 and when I tried 1.3.9, I noticed this happening in some of my forms. It is reproducible in all browsers I've tried, including the latest versions of Chrome, Firefox, IE, & Safari on OSX 10.8.5 and Win7.