Index: FOPropertyMapping.java
===================================================================
--- FOPropertyMapping.java	(revision 815368)
+++ FOPropertyMapping.java	(working copy)
@@ -2525,6 +2525,7 @@
         m  = new LengthProperty.Maker(PR_PROVISIONAL_DISTANCE_BETWEEN_STARTS);
         m.setInherited(true);
         m.setDefault("24pt");
+        m.setPercentBase(LengthBase.CONTAINING_BLOCK_WIDTH);
         addPropertyMaker("provisional-distance-between-starts", m);
 
         // ref-id