I am using SW2011 SP3.
I just upgraded from SW2010 SP4 yesterday and am noticing a few differences.
I am noticing that if I have a sketch with a block in it and I am editing that sketch and click on the "+" next to the sketch in the feature tree to show the block, the feature tree won't expand. Double clicking on the sketch seems to get the feature tree to expand and show the block. The same behavior occurs for trying to collapse the feature tree.
I can't say if this behavior was there in 2010 or not, but I did not notice it.
Anyone else see the same behavior?