Unless you have some special reasons for running Debian 3.0 ('woody', current stable release) as that is three years old, I recommend installing
Debian testing ('sarge', what will become the next release 3.1), that is much better to use currently for desktop/workstation purposes.
What hardware do you have? Your DMA issues could be because your hardware could be considerably newer than the kernel in Debian 3.0 ('woody') as that is three years old and thus cannot possibly have proper support for all the very latest hardware.