My mistake sorry I always forget to add to the svn mailing list - it sends a diff of the changes made... all sorted now.
I notice in Prices.php - a funny thing? See link
http://web-erp.svn.sourceforge.net/viewv...34&r2=4803
It looks like I was not sending the Price value correctly but the " may be a problem in this code... will check later...
Code changes look pretty

I see I missed a ; in the Tax changes to SupplierCredit.php and a typo in index.php - thanks for fixing!
Brilliant to have you helping with the code