We have a SharePoint solution that defines a list type that is derived from the built-in generic list (so we can add additional functionality, such as event receivers).
However, when I try to activate the K2 application for such a list I get the following mesage:
"The current list is not supported by K2 for SharePoint. Select a different list for creating a K2 Application."
Is it not possible to activate the K2 application for a type that is not either a document library or a generic list?