What is the depedency between menus and collapsible regions?

[maya]

Hi,

I have an application with 3 regions: north - that contains only a toolbar; east, ant center.
When I changed my app. to RTL mode I found out that if the east region is collapsible, menus in the north toolbar can be opened as expected. Nevertheless, if the east region is NOT collapsible (collapsible: false), menus in the north toolbar can NOT be opened (when clicking them they just have the "clicked" style, but the drop-down menu is not presented).

I can't define my east region as "collapsible" since it doesn't work well in RTL apps.

Any ideas how to make the menus in the north region open? (What is the dependency between menus and collapsible regions?)

Thanks,
Maya

BTW - if I move the menu to the center region - the drop down list appears, but them the content in the center region disappears. Only when opening a combobox in this toolbar, the content in the center region re-appears. Any ideas?