Flash CS6 split view window/focus issues.

Question

I'm using Flash CS6 editing multiple AS3 files and the file tab selection behavior is frustrating and I was not having these issues in Flash CS5.5.  When viewing two code windows in a split plane, clicking from one window to the next does not automatically focus/activate the code tab.
Steps to reproduce:
1) Open two AS3 files and arrange them into a 2 window split view.
2) Select the code file tab on the right.
3) Within the right code file, copy a line of code.
4) Click the mouse within the first code file on the left and paste your code line.
5) Note that your code pastes into the right file.
6) Note that the left code file does not receive focus when the cursor is in the window.
OS: Win 7

Answer 1

Ya, I havent used Flash Builder yet only because FP is what I'm used to.  However, just imported my project into FB 4.6 and it's alot better so thanks for the tip.
So I tried undocking, and the bug remains if you copy a line from one 'undocked' tab, into a docked tab. However if both code windows are undocked, the copy/paste and window focusing works fine, but in my case with ~20 class files, it would be a nightmare.
The workaround is either edit the project in CS5.5, then open and re-save it in CS6, or in CS6 click the file tab you want to edit, then click within the file, then paste, every time you are copying a line from one file to another.