I was looking at the
HCL entry for the Netgear FA311 and it seems that it is actually a very compatible card. One of the guys there uses the
"tulip" drivers, not the natsemi ones - have you tried tulip? You may want to see if the tulip ones work, and if they don't then please report back.
J_K9
P.S Could it be possible that your current version of natsemi is having problems with some of SUSE's software or kernel?