E_NOTICE

[robeRt]

index.php
29-30

// !!! Change to E_ALL ^ E_NOTICE.
error_reporting(E_ALL);

Despite the comment, it seems you forgot to disable the notices from being sent to your error handler.

[[Unknown]]

The "// !!!" comment mark is a marker for me to look at later.  Right now, it is in "debugging mode."  This isn't a problem though, since SMF - unlike practically every other script found on the web - runs perfectly with notices on.

However, for the stable release it will be moved to not reporting errors.

-[Unknown]