A fix for the WP7 Toolkit LongListSelector (aka JumpList)
I ran across this issue while trying to duplicate the functionality of a third party jumplist. I wasn’t necessarily trying to replace it but just trying to learn how to make the LongListSelector from the Windows Phone Toolkit behave the same way. Along the way I learned a little bit about how LongListSelector was put together. Reading someone else’s code is always a good thing.
The problem is no matter what HorizontalAlignment property is specified on the control contained in the GroupItemsPanel ItemsPanelTemplate the content of the popup is always centered.