Eclipse cannot save python2.7 interpretor - eclipse

Though this is strange but happening with me. I add python3.2 in in the Pydev> interpreter-python it is saved for always. I can run my scripts pretty well. But when I add a 'python2.7' in the Pydev> interpreter-python it shows there till preferences window is open and once I close the preferences window it disappears and takes other interpreters with it. I mean an empty 'interpreter-python' setting.
I save my workspace in dropbox so that I can use share my settings on different systems both using Ubuntu 12.04 X64. I am sure it is not a Dropbox ACL setting issue as 'Python3.2' settings save and work pretty well until I add 'python2.7' which removes all the interpreters including itself.
Please Help. Unable to code.
AK

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How Can I Always Reset My Workplace Settings for Every Time I Quit VS Code?

What I want is to have all of my workplace preferences reset every time I quit VS Code. Right now, if I quit the application and opened the same folder I previously closed, VS Code still retains all pointer positions and all opened files. This maybe good for a lot of people, but for me, I just feel overwhelmed.
What I have tried:
I tried to locate .vscode folder but it is non-existent in my project folder.
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In the settings menu you can search for window.restoreWindows and change that to none. You can also change workbench.editor.restoreViewState to false which might also help.

eclipse - swt - using windowbuilder in xfce env

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The alike issue it seems I found related info in official eclipse indigo offline Help which says :
How can I prevent the preview window from flashing under Linux using Metacity
In order to create the graphics that you see in the design view,
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Open a terminal and chdir into the directory with the source code (nice if you have already done this)
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Run "make all".
Make sure that steps 9 & 10 completed without errors.
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well seems like I have the snapshot really but, as I can get it, the snapshot doesn't want to dispose or similar so I have either resize the whole eclipse or press F5 to refresh (which works not at once);
I am not sure how to fix the issue in case I have xfce+adwaita installed? I don't have metacity installed; Seems like xfce works with gtk instead of metacity (correct me if I am wrong);
So my question is... how to fix the "window flashing or freezing" if I have :
xfce4
adwaita-dark theme
linux arch x64ce
Thanks
Try to install install libswt-gtk-3-jni and libswt-gtk-3-java.

Install VSCode in a specific folder

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Full credit to Hans Passant for giving the following working solution as a comment.
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I just downloaded Eclipse IDE and Netbeans directly from the websites and installed then in my Ubuntu 12.04. I have some questions:
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Sorry by my poor english.
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For Eclipse:
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