I've just noticed that ex_resize 2 resizes differently on 5.1 . Rather than stretch the window like in 5.0 it actually resizes in real time. Is there a reason why 5.0 cannot do it like 5.1?

Thanks

Check the SVN commit logs.

Note that everything is generally committed to 5.1 and then applied to 5.0 right before a release. So just because something is in 5.1 doesn't mean it won't appear in 5.0.

Alright thanks I'll check the logs.

In this case I don't know of any change since 5.0.2.1 that would account for the difference. You could bisect the 5.1 branch until you find the commit that is responsible. Then we can see if it was deliberately or accidentally left out of the 5.0 branch.