Comment 15 for bug 689286

So i have some good news...

1- I could open the project from a saved file, but once the project is loaded to Gephi, it was not possible to save it anymore
2- The problem didn't face all projects i've saved before
1&2 ==> 3- The problem is related to the specific project file
4- Not all project files are affected
5- Some Ok project files get affected
4&5 ==> 6- An operation or more corrupt the project and makes it unable to save
7- I have no 3rd party plugins ==> 8- It must be a core operation in Gephi
9- I looked around and eventually did the following
    - Clicked on Preview
    - Clicked the refresh button
    - Waited until refresh operation concluded
    - Clicked Save
and it worked
6&8&9 ==> 10- If Preview was once used for a gephi project, the preview must be refreshed before saving otherwise the project file is corrupt.
10 ==> 11- Gephi people please check that :-)