The current portage ebuild for xmlto doesn't check for the latest version of libxslt. Had to manually update this library to get xmlto to cooperate in compiling kde 3.5 Reproducible: Always Steps to Reproduce: 1. 2. 3.
xmlto doesn't require the latest version of libxslt. Chances are you experienced a bug in your system that may be related to your compilation flags. See bug #113512 for another example of such situations. In order to properly debug we're going to need more information. Initially, the full emerge log and the output from emerge --info.