Ha. Good that I posted about it then
About the regions, this is a known problem. Make sure that your avvie is always in contact with the region. Ie: if move your region slightly above the ground so that your avatar always walks inside the lower face of the region.
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Also you need to make your region that when your avatar jump he doesn't look 'contact' with the region. Best way to do this it to make the lower part of the region above the ground and the higher part slightly bellow the avatar head level.
Like this: