Well this may kinda be a broke item.
I just tried in the CP>>General-General Options:
Table Width: (all screens)
Without any type of container. Just changing the setting.
If you set it to say less than 55% the same problem appears. But also the rest of the items start to look bad also.
Anything above 55% seem okay.
Again I don't see why you changed the display to accommodate 1024 in the first place. Can you expand on what the original problem was ,because I have not seen any issues at 1024. So maybe some of my users have a problem I am not aware of.
