Setting static IP through Ethernet
Remove Wicd from Startup services:
Start Control_Panel (zenpanel}Reboot.
Click on Startup_Services
Click on Session_and_Startup in XFCE Settings Manager.
Click on Application_Autostart
Uncheck on Wicd.
Set up through netconfig (Just enter the required information):
$ suRestart network (if you know how) or reboot.
Gmail Display problem
This is how Slackware site looked on Iceweasel on Zenwalk 6.0.
Similar problem was happening in Gmail. After reading on Zenwalk Forum I added the following lines in Device section of xorg.conf and it worked.
Option "AccelMethod" "XAA"
Option "XaaNoOffscreenPixmaps" "on"