Calling PrintService.getSupportedDocFlavors() returns an array of supported doc flavors where some of the doc flavor entries are duplicated. Typically, the following entries are duplicated on CUPS - linux:

text/html; charset="utf-8"; class="[B"
text/html; charset="utf-8"; class="java.io.InputStream"
text/html; charset="utf-8"; class="java.net.URL"
text/plain; charset="utf-8"; class="[B"
text/plain; charset="utf-8"; class="java.io.InputStream"
text/plain; charset="utf-8"; class="java.net.URL"

This is reproducible on all the Tiger builds, on Linux. Not reproducible on Solaris and Win32. I tested this with Linux AS 3.1, RH 9 and Cinnabar.

I have attached a sample test. Execute the sample test on linux. Make sure you have a default printer configured on your system. You will see a list of doc flavors that are duplicated.

A similar bug was filed before (4996318) and got fixed in the current mustang PIT build. This fix has removed one extra entry for 'text/html; charset="utf-8"; class="[B"' which used to appear thrice before. Now it is appearing twice on linux. But this fix has eliminated the duplicate entries on solaris.