In XSLT, using <xsl:number level="any" from="/"> produces no number in the output. The problem is specific to the TinyTree.
(Internally, Saxon uses a special axis preceding-or-ancestor to implement level="any". This axis, in its TinyTree implementation, is not selecting the document root node.)
A patch to module net.sf.saxon.tinytree.PrecedingEnumeration is being placed in Subversion.
The problem is likely to affect all previous releases.