Mavericks Finder spins when opening folders
There are a number of Apple Support Communities discussions regarding this, and a number of possible fixes given. To summarise in case one works for you:


Disable Finder App Nap

This seems to fix it for almost everyone on ASC who had Finder working fine in 10.8 but now is 'broken' in 10.9.

sudo defaults write com.apple.Finder NSAppSleepDisabled -bool YES


…then log out and back in with 'Reopen windows when logging back in' disabled.
Clear Finder Caches

Empty ~/Library/Caches/com.apple.finder and restart Finder.

rm -r ~/Library/Caches/com.apple.finder/ &amp;&amp; killall -HUP Finder

Reset Finder Preferences

Related to above — delete both preference files used by Finder:

rm ~/Library/Preferences/com.apple.finder.plist ~/Library/Preferences/com.apple/sidebarlists.plist

Reindex Spotlight

sudo mdutil -E /

Change the 'Show Scroll Bars' setting

It seems that it can be fixed by changing the scroll bar setting in System Preferences → General from When Scrolling to Always.
Repair Permissions

Try repairing permissions in Disk Utility.