Several of my users reported not being able to see the Tiny MCE toolbar, I’ve confirmed that this seems to be an issue related to internet Explorer and I was able to replicate the issue when i tested myself.
I cleared cache/cookies, deselected & reselected the Tiny MCE editor, tried compatibility mode in IE and the button son the menu bar don’t show (with the exception of the spoiler button which shows up all on its own).
A separate issue most likely but users have also reported that the forums are very slow using IE but when they switched to Firefox it was much faster.
EDIT: The issue with the toolbar not showing seems to be related to the GRAND Flash Album Gallery plugin which I’m happy to just stop using, installed it recently but think it’s too bloaty.