Just a minor no loss of function bug. 

A generic error is generated if no default alert is selected in lookups and then someone attempts to create a Customer Alert. 

The error is a nullpointer exception and can easily be replicated if you remove the default tick out of the lookup alert list.  The problem is immediately resolved if you reselect the default. While this behaviour may be intential to avoid alerts with no type, the error should be more imformative to the user so they can manage and resolve it.  IE

"Please ensure your administrator has selected a default alert type, prior to attempting to create customer alerts"

Cheers

Ben