Hi gang,
I've figured out the problem you are having...
I accidentally made reference to the incorrect image in the css.
That's what happens when you rush something
For Linear:
I called it
"checkout-tabs-linear.jpg"
it should have been
"checkout-steps-linear.jpg".
For Standard:
I called it
"checkout-tabs.jpg"
it should have been
"checkout-steps.jpg".
To fix this problem simply replace the image names in your css file or download the updated zip files here:
http://www.xcartdesigner.com/xcart-fastlane-mod.html
Hope that does the trick.
regards
W.