1
If someone on the core team gets a moment, it would be nice if they could update the code in 'system_notification_select.html' so that it validates with the W3C. The '[' character is not allowed in the value of an ID, and duplicate IDs are also a problem, for example...
<input type="checkbox" id="not_list[]" name="not_list[1][status]" value="1" />
<input type="checkbox" id="not_list[]" name="not_list[2][status]" value="1" />
I know this doesn't stop things working, but it is annoying when you eventually get some old module HTML to validate and the only remaining fail is the core code.