Table inline-progression-dimension %

[Francis, Ronald]

Hi,
 Is there a known problem with using percentages with table property
"inline-progression-dimension" 
eg <fo:table inline-progression-dimension="3.0in" table-layout="fixed">
works,but <fo:table inline-progression-dimension="50%" table-layout="fixed">
gives me -
[ERROR] Error in text-align-last property value 'relative':
org.apache.fop.fo.expr.PropertyException: No conversion defined
Thanks,
Ronald