Question for Unity engineers, does Unity 4.6 include all the bug fixes and features from 4.5.3?
I also realised some patches have been released but need to know if I should run dual 4.5.3p2 with the 4.6 Beta? Very important as do not wish to make a GUI project in 4.6 beta to find out later its bugged.
Thank you
pS also is this going be only one public beta build or more to follow and how often?
As it stands, this beta (4.6.0b17) is merged with 4.5.3, none of the weekly patch releases that are found here (Unity Patch Releases - Industries - News & General Discussion - Unity Discussions)
This is a beta version, it is going to have bugs.
Thanks Josh for the swift reply, I understand, cheers 
Now that beta 18 is out, does this contain the 4.5.3 patches.
I ask as wish to know which version to keep installed with most fixes.
Update each week with patch releases or keep Unity 4.6 beta
4.6 beta’s will only contain the 4.5.x releases. Not the patch releases. So 4.5.4 will be the next batch of changes that will be included in 4.6 beta.