It's already been posted in this thread, the issues of this upgrade. I has also been posted that this upgrade was a "compatibility upgrade" and not meant to rectify all known issues. It has already been posted that there will be another update coming shortly to address some of the bugs being reported. Plus, an HTC Sense UI upgrade will be coming with that second upgrade.
Folks need to understand the true nature of open source software. Unlike Apple (proprietary), open source comes in many flavors and in order to provide updates/upgrades, individual manufactures need time modify the source code to best suit their devices, but because demand from the end user can be quite high, too often those same manufacturers push the software earlier than they would like. But in doing so, a more generic version gets released in order give more end users a "taste". Also, many app creators haven't yet caught up to the upgrade as evident with Netflix. They were slow to even have an Android app to begin with. And they will be slow to update a new fix for gingerbread. This is one of the few faults of open source software.