2010/11/18 Hans Hagen
After some tracing and hard thinking Taco and I found interesting spaces showing up in the output that result from a kludge in tikz:
Normally one will use \ignorespaces to catch spurious spaces but tikz invokes \nullfont assuming that its fontdimen 2 is zero. But, in context it no longer is (prelude to delayed font loading).
You can put this in cont-new.mkiv as a temporary hack
\let\normalnullfont\nullfont
\def\nullfont {\fontdimen1\normalnullfont\zeropoint \fontdimen2\normalnullfont\zeropoint \fontdimen3\normalnullfont\zeropoint \fontdimen4\normalnullfont\zeropoint \fontdimen5\normalnullfont\zeropoint \fontdimen6\normalnullfont\zeropoint \fontdimen7\normalnullfont\zeropoint \normalnullfont}
Perhaps this should be forwared to Christian Feuersaenger. He is very open to bug reports and will probably be willing to fix it in some way in TikZ. Regards, -- Vedran Miletić