All images that are used as part of the user interface should have
sensible alt text.
Example 1: In the enhanced recent changed display, when there are
several changes to the same article, there's an image of a blue triangle
that changes it to a blue triangle pointing down. I think alt="+" and
alt="-" would be appropriate here, but both images currently have
Example 2: In the 1.4 software currently installed at test.wikipedia.
org, redirects are displayed using an image. I think that alt="REDIRECT
" would be appropriate, but the image currently has alt="Image".
I suppose all this should be customisable via messages in the MediaWiki
namespace, but sensible hardcoded alt text would be better than the
non-sensible hardcoded alt text we have now.