I am currently not receiving emails when a page on my watchlist changes, or when my user talk page is changed. The "E-mail me when a page on my watchlist is changed." and "E-mail me when my user talk page is changed" checkboxes are checked on my preferences page.
I have tried unselecting the checkboxes, saving them, then reselecting them.
I have tried changing my email, confirming, then changing it back and confirming.
I do receive emails for password resets.
I have checked my spam filter for the e-mails.
I recently initiated a login unification (to unify my en.wikipedia and wikimedia accounts), and accidentally clicked to try to unify with a Lotze account on de.wikipedia.org (which does not belong to me); the unification is still not complete. I do not know that this is related.
OS: Windows XP