I have started a page on the Jaybird wiki on using Jaybird with Firebird
3.0 alpha 1:

http://jaybirdwiki.firebirdsql.org/jaybird/doku.php?id=tip:firebird30a1

It lists know problems, compatibility issues and workarounds between
Jaybird 2.2.x and earlier and Firebird 3 (alpha 1).

It is a work in progress, but I hope to have all the basics listed by
Sunday. If you miss something, or something doesn't work for you with
Firebird 3, let me know.

Mark