cant manage tabs

An alarming issue.
Please clarify.
What OS do you use, what Chrome/Chromium version?
There is no such feature to lock the dragging.
And i cannot reproduce this issue myself.

Does the Chrome restart helps?

I am using windows 7 with Chrome v32.0.1700.107 which it says is up to date. (Tabs Outliner 0.4.78)
I thought it was an issue but I have only been using it a few days so I was not sure.
Closing Chrome and reopening Chrome has no effect. I could try re-installing the extension but I thought that might clear my tabs, and then you also wont know what is causing the issue.
Is there a way to get a log or error file?

Yes, reinstalling will clear the tree. 
Note that you can save a read only version of the tree in HTML file, through Ctrl-S (expand all nodes before this). From such file is possible to drag hierarchies back to main view.

Interesting issue. I cannot reproduce this. And of course if this will be a common problem than there will be literary hundreds of such reviews and emails.

The log file unlikely will help.

Through you might try to open the console of Tabs Outliner view. Maybe it contains some errors.

Try to drag items (to produce fail scenario)
Right click anywhere, select "Inspect element"
Select console (last menu item) in the window which will open.
Copy there its content.
Maybe it contains some clues.

Also please try to remember what event happens with Chrome just before this problem. Something that might look relevant.

> Closing Chrome and reopening Chrome has no effect.
Also please try to exit Chrome completely
Through the Exit menu item in its main menu.
Often just closing the Chrome does not completely restart it.

FIXED: Closing Chrome from the Menu-> Exit or CTR + SHIFT + Q, fixed the issue.
I didn't bother looking in the console, and I didn't need to re-install the extension :) Thanks