Taxes and combinations calculation error in 1.3

[Roller]

Hey guys, I have searched the forums but have not found an answer for this.

When I set a tax the price for combinations is calculated incorrectly:

For example an item is $50, and there is a combination of that item where the price is set at +$10. When you view the second combination as a taxable customer, the item is supposed to be $60, however it is instead around $59.

I know there is a fix someone posted a year ago for 1.2 but I have not found a fix for this issue in 1.3.3

[EDIT]
I just found out if I change the group to Price Display Method: Tax included it will apply the tax twice. =(

[Roller]

Bump - Problem still exists in 1.3.4

Also in the 1.3.4 description I see "Improvement of tax management" but there is no mention in the actual changelog, and the tax management seems to be exactly the same to me.