Common User Agent Problems

This document explains some common mistakes in user agents due to incorrect or incomplete implementation of specifications, and suggests remedies. It also suggests some "good behavior" where specifications themselves do not specify any particular behavior (e.g., in the face of error conditions). This document is not a complete set of guidelines for good user agent behavior. This document does not incriminate specific user agents. W3C does not generally track bugs or errors in implementations. That information is generally tracked by the vendors themselves or third parties.