A new 'virtual' keyword was added to githead of dmd on 2014Feb25 which conflicts with two files in GtkD. 'virtual' is used as a parameter name in:

src/gtk/Printer.d:168
src/gtk/Printer.d:171
src/gtk/Printer.d:174
src/gtkc/gtk.d:7783

Changing parameter name fixes conflict.

Thanks,
ollie