I have recently submitted several bugs for VW 2011. The followup, from NVW tech staff, has been very quick, attentive, and thorough.
I have been using VW 2011 Architect w/ Renderworks since it was available. I have been working around a few notable bugs but these annoyances (which are truly annoying and which I do not excuse) are small compared to the value of the improvements in 2011.