Do accessibility features conflict with other user agent features?
A user does not need every user agent feature at all times (whether a feature related to accessibility or not); every developer therefore offers configuration options. UAAG 1.0 emphasizes configurability to ensure that accessibility features do not conflict with other user agent features. Furthermore, it is expected that UAAG 1.0 requirements will improve the overall usability of user agents; see also the question about other benefits of UAAG 1.0.