Thought I'd add my bugs and quibbles too, like many others I found problems with the delete key but the worst problem was that I suddenly and at first inexplicably started to get Low Memory warnings,
I did a general clean up but it still didn't clear the problem and it
wasn't until I defragged the drive I noticed a batch of files I didn't recognise
being shifted, I had to search in Hidden Folders to discover this;

poserTemp files.
C:Documents and SettingsdaveLocal SettingsTempPoser 7

7,965 objects 12.9Gb
 created between 13/12/07 (the day I installed P7) & 27/12/06
risen to 16.9Gb by 01/01/07

What are these, do I need them, why aren't they cleared automatically?

Other issues;

Hierarchy Editor, flashes horribly when any item is clicked

Animation Palette;

1. when dragging frames along the timeline the window expansion is jerky
   & sticks a couple of frames short of the end of the timeline.

2. Frame copying using edit>copy>paste is not consistent when
   sampling multiple frames,tends to only copy/paste one frame
   shortcut ctrl+c/v works fine.

Figure/Object Cloning

Really useful, but not always consistent (especially on 3rd party figures)
Programme gets very sluggish and cross-talky with more than 3 dressed figures.

Animation layers.

Again a fantastic addition, results so far  bit patchy,
but I think I need more practice before I can comment.

Visibilty.

Another great addition, on/off is fine but opacity levels seem rather unpredictable
when stretched over frames. Silhouettes rendering more smoothly than full renders,
perhaps not surprising, but who wants a mask out of sync with the master track? 
 
Python, sometimes works others not, can't seem to find a rational explanation for this, but I often use Ockham's "Jiggles" script for hair and tail movements, so I have to switch back to P6 to use this.

3Dave