WARNING: col1 and col2 options in v.to.db were replaced by
multiple col option.
Also the possibility to upload z coordinate for points was added.
You can do
v.to.db map=xxx option=coor col=x,y
v.to.db map=xxx option=coor col=x,y,z
BTW: Anybody has a better name for option 'option'?
Radim