Printed Charts Problem

First, I am loving this new custom charts thing! This is really awesome. If we had the ability to toggle off the connection lines between data points when graphing with a trend line it'd be completely perfect! That aside, I tried to print one to a PNG to upload to Twitter to broadcast this new feature and noticed that both with printing to PDF and PNG the trend line prints as a solid black. Second the scales of the axes seem to be different. I believe they have the same ranges but because the aspect ratio and size changed the granularity isn't as good.