Wrong max color sliders values

The maximun value for any color slider are 245. Even when I set a color from the color bar, they are shown transparent (because the 245 alpha value).

If I write the hex value FFFFFFFF, the color appears normal, but the sliders shows 245. Then I do click on any sliders, everything sets up again to F5F5F5F5.

Even the CMYK sliders can't have a value greater than 90 (as Josh Andler points out)

Screenshot: http://drmad.org/inkscape-046-problem.png

This happens using Inkscape 0.46 stable from sources ( I've tested also SVN with the same results) with gtk+-2.13.6 and using this patch http://launchpadlibrarian.net/15113774/gtk-clist.patch for a compiling bug (of Inkscape). Using previous versions of GTK (I didn't remember the version), the same version of Inkscape works pretty well.