For some time now, with 2.6, I have had issues with using Spark via Windows Remote Desktop. The Spark window just does not redraw correctly and so the application is rendered useless. Have previously reverted to 2.5.8, but now that 2.6 is nearing release, I tried the latest build and the problem persists.
The login screen is ok. but the menu drop downs in the main window, dont draw correctly. Context menus seem ok, as does the roster list.