I am using the pre .46 release for windows. When I draw with the calligraphy tool and overlap a continuous line, the intersected area turns white. I don't remember this happening on previous versions. Is this normal? Can it be changed so that if you are drawing a black line, the whole line is black, even overlapping portions. Thanks.

In the Fill and Stroke dialog, make sure you have the fill-rule set to "nonzero", not "evenodd" (top right, on the Fill tab).