When comment notification email isn't arriving...

[prillalar]

... look to the Recent Comments page. The top will show you the most recent comments on your own LJ (also useful for reading fb you receive on racy stories without opening the email with the racy story in it) and the bottom will give you links to the comments you've made.

Can't stop the signal! (Or maybe that should be, "Face it, we're all addicted".)

Comments

[akatonbo.livejournal.com]

It doesn't, but it does show you where you've made comments in other people's LJs, or in communities, so that you can go directly to all of them easily to look for replies instead of having to hunt around for them.