There are a few cases where we are not adhering to the 'Understanding Resize text' guidelines for a AA accessibility rating. Except for captions and images of text, text should allow to be resized without assistive technology up to 200 percent without loss of content or functionality. This bug serves as a collector bug for cases where this guideline is not being adhered to.
I think Bug 20168 made a lot of improvements in this area.
Is there a way we could identify this type of issues?