This is a meta-task existing to track specific cases of system functionality unexpectedly breaking when people disable System Tray icons that provide it. Do not trask cases where only shortcuts break; that's for Bug 443036.
Does it still make sense to have a metabug, when it now only tracks one bug? Seems redundant…
Two are still open, but the number doesn't really matter; the meta-bug is for grouping and record-keeping purposes, so it's easy to track the overall status of the issue.