Piwik (Advanced mode) using "Select a database to use" option:
Installer used a dbuser that didn't have access to the database selected (but gave that dbuser permission - so the one-click worked). Expected behaviour would be that it use a dbuser that already has access to the selected db.
On checking via phpMyAdmin using the installer-selected user/pass, not only did the dbuser have access to it's own db and the new piwik db, but also had access to a StatusNet db for another account as well.
Assumption is one-click is selecting this user as some kind of "default" for any Advanced Mode Installation when the "Select a database to use" option is used.
On removal (Advanced mode) of the above install, received email:
Email is ambiguous.
/home/user/sub.domain.com exists (all files remained on server).
Maximum Cash Discount on any plan with MAXCASH
How To Install PHP.INI / ionCube on DreamHost