The labels of dimensions in PG exporter are moved half text-height. Thats a bit much, and actually, no such movement looks more true to the display of same in QCAD itself.

--- SvgExporterPG.js.orig	2011-10-15 18:57:29.994666881 +0200
+++ SvgExporterPG.js	2011-10-15 18:57:39.284666834 +0200
@@ -434,7 +434,7 @@
         //debugger;
         var angle = this.text.getAngle();
         //this.text.setAngle(entity.getAngle());
-        var offset = RVector.createPolar(this.text.getHeight()/2, angle + Math.PI/2);
+        var offset = RVector.createPolar(0, angle + Math.PI/2);
         this.text.move(offset);
         this.textColor = entity.getColor();
         this.exportText();