Count() function or xalan:distinct() extension function broken in post 2.3.1 builds?

[Rick Bullotta]

The following expression evaluated properly in 2.3.1 and earlier, and
returns, of all things "-1" in the latest nightly build.

        <xsl:variable name="UniqueSystemIDCount"
select="count(xalan:distinct(/Rowsets/Rowset/Row/System))"/>

Rick Bullotta
CTO
Lighthammer Software (www.lighthammer.com)