Issue :
This is a simple test to see if no-repeat is supported by all browsers.
In NS4 you should see two squares with background image, as one Layer is used, and one DIV.

In NS4 it seems when a layers background-image is set with layer layer-background-image no-repeat is not supported

Layer 1

This layer is defined with a <LAYER> tag.

You see that the background image is not repeated. (NS4 only)

DIV 1

This DIV is defined in CSS syntax.

The style definition sets the background-image property which is not repeated.