Having played with this beta for an hour or so, my first impressions are that the mapping engine is a nice improvement. I have found a couple of points for discussion.

I've been using beta 2.3 since January and although there were a couple of peculiarities which have been resolved, I hadn't noticed yours findings. I have just gone into the beta version on my PC and my charts appear fully as soon as I click the initial 'yes' button. When I zoom in on the waypoints I just get the shape I initially used e.g. 'circle' triangle' etc

I'm using UK chart view, but have just tried High Contrast and Skydemon view in case it reproduces what you are seeing, but it doesn't.

A couple of quick comments after (a very short) play with today's (21/2/2012) beta release.