Mosto of those who've submitted bugs in the last few days probably got their confirmation emails today. This is because of hiccups in our bug-tracker, and not related to us getting or not getting the reports: we've been getting them all along.
As always, please report any issues you have using Report Bug.app; it's super-important to us.
Just in case you're curious we're using FogBugz by Fog Creek Software for our bug-and-issue tracking. It's a product that's really nice in use, but unfortunately it has quite a lot of stability issues. We try to keep those under control.
maybe they need some testing of their bug tracker