crossdomain.xml

After running the project which requires some online downloading of textures (thumbnails off a client's product database), I get an error like so:

SecurityException: Reading from the screen is not allowed when you have 
used a downloaded texture without proper crossdomain.xml authorization
UnityEngine.Texture2D.ReadPixels
 (Rect source, Int32 destX, Int32 destY) (at 
C:/BuildAgent/work/f724c1acfee760b6/Runtime/ExportGenerated/Editor/Graphics.cs:1089)

Especially when trying to fire up SF (ends up with a blank window). Have to restart Unity to clear the error.

This might be more of a Unity thing though., with it's security preventing even editor side code to run.