open a item (e.g. dokument or composite section) so it will be shown in the meeditor. now set the focus back to the navigator (e.g. mark any item there) and then open the "select element"-dialog on meeditor side by clicking directly on the associated button (e.g. for a new annotation) so i get an "unhandled event loop exception" (details see comments). when i click on the button once more the dialog opens correctly.

the exception comes on my win 7 x64 machine, but not on a mac.