Strange TAX behavior in Quotation module - Canadian GST/PST

["Jerome Oufella" <..hidden..>]

Hi everyone,

I'm getting a strange behavior when entering a taxable item in the
Quotations module : the Quebec provincial tax (TVQ) is calculated
after the raw product price but should be calculated on the price
majored by the federal tax (TPS).

In my case, TPS is set to 5% and TVQ to 7.5%. TVQ is set to pass after TPS.

However, the tax is well calculated in the Sales Invoice panel, with
the same tax settings.

Screenshots available here :
Quotation : http://i34.tinypic.com/dgs77d.png
Sales Invoice : http://i34.tinypic.com/98f5ae.png

Anyone has a clue about this behavior ?

Thanks in advance.

Jerome