Log Message:
Update to 4.999.9beta:

XZ Utils 4.999.9beta was released on 2009-08-27. Among many less
important changes, this release fixes a data corruption in the
compression code.  (The bug was specific to XZ Utils and was not
present in 7-Zip or LZMA SDK.) Everyone using an older version of
XZ Utils should upgrade.

This is the last beta release before XZ Utils 5.0.0. No big changes
are planned before the first stable release.