Hi,

I've uploaded XF 4.2.0 and 4.2.1 sets for the release of 1.6.  They're available from:
ftp://ftp.netbsd.org/pub/NetBSD/arch/cats/

Note that the mirrors may take a while to update.

Of note is that the release of 1.6 for cats uses the 3.3.6 client libs.  This is an issue that needs to be dealt with on a general scale for all the arm based ports.  If you do switch to XF 4.2 you may find conflicts with prebuilt X packages.

Cheers,
Chris