Regarding error 3, it looks like it's still getting ahold of the old uc_quote.module. Alpha 7c should have created a shipping directory with a uc_quote subdirectory. That will contain the updated version. You should then delete the old uc_quote directory. And just for good luck, you should probably go to the modules list page and submit the form with no changes so Drupal saves the new file locations. Will look into the others in the morning.