Hi JoJo_2nd,
I cleared the cache manually, as you suggested. As I mentioned in my question, the out of memory error just happens sometimes. After clearing the cache the game runs fine (with the warning, though). After a couple of refreshes/revisites of the site, the error appears again (in Shipping; again, only sometimes) (Firefox even crashed once, I attached the [crash report][1], maybe this is relevant).
The warning appears every time, in development and in shipping builds.
The package size with UE4.6.1 was about 91 MB.
With UE4.7.2 it is about 70 MB. I didn’t change game content. I guess the smaller size is due to the better compression and the .pak file which was introduced in the new engine version… When serving the game compressed, the size is 27.7MB.
