Esta vez me ha pasado por alto por que se produjo el lanzamiento el pasado dia 12, pero aqui esta el anuncio de Marco van de Voort extraido de la lista de correo:

Free Pascal 2.4.2 contains many fixes and a few new features. Most bugfixes in the RTL and packages 
before june 2010 have been merged.
Please also see http://wiki.freepascal.org/User_Changes_2.4.2 for a list of changes which may affect 
the behaviour of previously working code, and how to cope with these changes.
Some highlights are:

Compiler:
  * Support D2006+ FOR..IN, with some FPC specific enhancements. 
    Refer to http://wiki.freepascal.org/for-in_loop for more information
  * Support for sealed and abstract classes.

Packages:
  * Many improvements to the XML units
  * Many improvements to the database units
  * Many improvemnets to the chm units

Platforms:
  * Long term bug in OS/2 implementation of unit Video finally fixed which among others allows 
    inclusion of the text-mode IDE (without debugger) for this platform as part of the 
    distribution again.

See http://bugs.freepascal.org/changelog_page.php for the list of reported bugs which have been 
fixed in this release.