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Pattern images can be color or black-and-white. To be used on Mac OS
systems, patterns must be 128x128 pixels or less, and both its height and
width must be a power of 2. To be used on Windows and Unix systems, height
and width must be divisible by 8.

Does that explain it?

Kevin

Kevin Miller <kevin at runrev.com> <http://www.runrev.com/>
Runtime Revolution Limited - Power to the Developer!
Tel: +44 (0) 870 747 1165.  Fax: +44 (0)1639 830 707.