I just upgraded to 5.0 and transferred over all my entities into the new version. I am seeing some issues. The first is that when I go into a mashup to edit it, I am not seeing everything correctly. When I visit the mashup outside of the composer, it also doesn't show up correctly.
For example, the widgets menu extends all the way down, covering up the widget properties window, nothing is visible in the mashup building screen in the center and data menu services are over lapping each other.
When I view the mashup outside of the composer, all of the widgets are black.