First question:
 Is it always bad to update Ubuntu? 
 I have an Acer with an Atheros wifi
 Wifi was working using madwifi before update
 When I try to follow the instructions on this page: 
http://wiki.eeeuser.com/ubuntu Under this heading
 Wireless internet using native Madwifi drivers 
 doing the 'make clean' step I get this: 
 dale@dale-laptop:~/madwifi-ng-r2756+ar5007$ make clean
 cd: 1: can't cd to /lib/modules/2.6.22-14-rt/build
 Makefile.inc:66: *** /lib/modules/2.6.22-14-rt/build is missing, please set KERNELPATH.  Stop. 
 Does the update change the kernelpath?
 How do I get this thing going again?
 This time I promise NO MORE UPDATES