View source tab opens at wrong tabbar position

And another one...

My tab bar behavior is set like this:
New Tabs will open at:    Right side of tab
Close Tab will switch focus to the:    Left side Tab

When I display the page source (or the mail message source) , the View 
Source tab opens at the end of tabs.

Expected behavior:    the tab should open at the right side of current 
tab, as set in the preferences.

Note: This wrong behavior exists even in the last stable MZ version 1.8.3.4.

-- 
	Bye, Evzen