Found another extension that actually seems to do what I want, without buggering up the Gmail links or Reader's ability to Share (which was another bug I just realized was probably caused by the old extension, since it now works): https://chrome.google.com/webstore/detail/ogcfegjiehdakiogchpnllekccphhebd
Whee! Maybe I'll start using G+ more now. (Here's hoping that's not a Very Bad Thing.)
EDIT: ...Shoooot. It seems the notifier is still there in Google Search. Then again, I think that had reappeared for the other extension too. EDIT2: Yes, yes it did... the problem is, the extensions work on Google.com but not Google.ca. Oh well.
Maybe I should just keep up with my notifications... or click and look at them and resist being distracted by them...