I don't have 2008 at home so can't test exactly but, I have esc bound to jj and going into visual mode to select lines with V and then immediately moving downwards with j works in 2008 while in 2010 there's a 1 sec delay between each movement. Probably to check for a binding. Going V then j j to select two lines doesn't in 2010, it just exists visual mode. Can this be to work like in 2008?

Selecting lines with V and pressing Ctrl+K, Ctrl+C to comment out those lines works in 2008 but in 2010 it only comments the last selected line. Probably other actions on selected text behaves the same way too.

In general the 2010 version of viemu seems a bit weaker. Like I mentioned above I have esc bound to jj and I notice a huge difference when it comes to switching from input to normal mode with jj. More often than not in 2010 the binding isn't respected and instead I end up inserting new characters while in 2008 that never seems to happen.