Random "Warning"-error by editing project description

[jo]

I'm getting randomly this error. Followed up by deleting all the project-thumbnails in the pages, were I was using them as a link to the project.

[jo]

I can give now a little more details about when it is happening: As long the project-thumbnail is not used already (embedded on the page), i can update the name and the description of the project. But as soon i have placed it somewhere, i get this error and i'm loosing the all the project-thumbnails (not only the one i was editing).

[arminunruh]

Hey jo!
Ahw sry. It seems you are using an older php version that doesn't support something. Anyway, going to publish a small update to fix this.

[jo]

Thanks Armin for the response. Which PHP-version would you recommend?

[arminunruh]

This was the problem: http://stackoverflow.com/a/22208945/3159159
I fixed this with the latest update. On stackoverflow they say PHP 5.4 or later.
Anyway, should work with an older PHP version too now.