Your comments

Same issue here with 0.2.7.839. The maximized window seems to be too large on all 4 edges. If you have more than one monitor you see the effect. But you also recognize the missing padding on a single monitor.
Well done, now everything is working properly!
Must be something more fundamental. Rearranging still takes about 5s in 0.2.7.835, and there is still a crash if I rearrange tasks in the "Done" folder (after the 5s delay).
Both problems still exist in 0.2.7.829. UI freeze of 5-10 seconds after rearranging tasks, and if you rearrange tasks it in the "done" section, then it crashes heavily after the freeze.
Talking about sharper icons... they are at least sharper than your user profile photo ;)
Yes, this happens every time. On my Win 7 installation the respite is longer than on my Win XP installation, but maybe this is because the former has much more actions, not because it's Win 7. And when I try this in the "Done" folder, I get an exception in both installations.
Good to see you working on Wieldy again ;-)

The filter options are nice to have. I only find it confusing that the *inactive* filters are highlighted with an orange frame, not the *active* filters (in r757).
Tested this again. Yes, it seems the data is saved when the windows is closed. But nothing is saved when the window is only minified, or when you shutdown the computer. I think in Java you have to implement special shutdown hooks, maybe something like this needs to be done for the CLR, too?