To me, 5.1.1 is my stable version.

The reason is that it works great on all my wireless machines. (i.e. they are old) However, I found that 5.1.1 is not really compatible with the latest hardware especially the video and SATA support.

I still cannot find a better CD compilation since 5.1.1, most of the newer version seems to missing a great deal of important apps/components in the CD distro. (i.e. wireless connection, ssh, samba etc) I don't know the others, but these are critical to me, I use it on my daily life and cannot live without it.

Rgds,
Chip