The Context Menu doesn't always display on the treenode... sometimes the silverlight context menu appears (in IE) but in Chrome with same test neither menu appears! I have the windowless= true set in the ASPX page.
My current app is quite large and it was difficult to figure out if it was a focus issue. I thought that maybe the tree had to have focus first ot maybe the individual node. I tested combinations of random left right clicking to no avail. So I created a test app to figure out what is going wrong. So I've found the problem I can provide it the sample project... it's easy to see & reproduce.
The behavior seems random... 80%+ the menu appears but sometimes the SL menu appears.
Ok... let me explain a little further. If I place the radmenu directly inside a RadTree then the menu pops up fine.
If I place it in the ItemTemplate then we have the issue.
I need to have a context menu for the items in the tree, not the tree itself & I'd guess most people are the same.
So after text and mucking around it boils down to this... if you have Grid with Column Definitions inside the ItemTemplate then the menu won't always appear. Use a stackpanel or absolute /margin based positioning to arrange Child Elements inside the template and all is good.
Support ticket for the sample?