Images don't show in Tiny MCE editor

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When editing a html block the images are not visible. When inserting an image from the library the code inserted is as follows:

<img src="/concrete5/index.php/download_file/-/view_inline/9/" alt="office1.jpg" width="494" height="480" />

When the block is saved, the images becomes visible and the path is corrected.

What's causing this? Is it some kind of setting?

I'm using version 5.3.3.1

Webcreatives
 
Webcreatives replied on at Permalink Reply
Webcreatives
We solved the problem by doing an new install.
The previous version was updated from an older version which probably caused the problem.