Finder and App windows behaviour erratic

Question

More OS X Mavericks eratic behaviour.
Have a Quicktime functioning movie clip open, click on the movie window in the background and Mavericks will not change to it. It doesn't come forward. Finder remains in front and active. The only way to reach it is to open the Cmd-TAB window scroller. ***.
Be in the QT movie window, and click on it, and Finder opens.
The reason you click on an application window is to activate that Window or item, not Finder?
if you have multiple clips open, then you may want to recheck something.
This is not intuitive or the same under SL or Tiger. And COUNTER productive.

Answer 1

The usual suggestions such as using Disk Utility to verify permissions and your drive.
[Resolve startup issues and perform disk maintenance with Disk Utility and fsck|http://docs.info.apple.com/article.html?artnum=106214]
[Using Disk Utility in Mac OS X 10.4.3 or later|http://docs.info.apple.com/article.html?artnum=302672]
[Disk Utility's Repair Disk Permissions|http://docs.info.apple.com/article.html?artnum=25751]
Is there a reason not to update all the way to 10.4.11? The 10.4.11 combo update links for [PowerPC-based Macs|http://www.apple.com/support/downloads/macosx10411comboupdateppc.html] and [Intel Macs|http://www.apple.com/support/downloads/macosx10411comboupdateintel.html].
I don't have much experience with running two displays since G3 days. It worked well back then and should now but if it were me I would try unplugging one for a while just to remove that as being a possible issue.
You could try removing com.apple.finder.plist from your Users/Library/Preferences folder and see if that helps. If it doesn't then you can stick it back on top of the new one that gets created. Sometimes the preferences get corrupted.