Recently a new type of web notifications were added: changes is project members / watchers. The idea is good, but the current implementation has a couple of problems:
* There should be a way to configure these notifications to Email / Notify / Ignore, just like the rest. Now they are only Notify, which means that users not interested in them are forced to handle them.
* ~~There should be a way to mark them as read. It won't happen visiting the two links they contain (tag view and user profile), the project description, members list, edit page... The only way is to "Mark All Read".~~ (seems to be fixed upstream)