I had a quick look and there is a photo in the library from Laurens with that title, it shows an M3W from front on and high up.
It is not triggering on any of my boxes but I do not use AVG which suggests it might be AVG specific issue. Someone has probably hit the report button by mistake and so the AVG central database gets and update and sticks a bad flag on it. If everyone accepts it is good this can feedback and may release the site.
The file appears as DSC00106.md.jpg suggesting it has been translated from a .md to a .jpg which might be what is triggering it. One type of file pretending to be another type of file would be considered a risk.
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