Original issue: #4097
I noticed that the icon for referrals from shortened URL http://youtu.be/ is missing.
Could the PNG file /plugins/Referrers/images/socials/youtube.com.png just be copied to /plugins/Referrers/images/socials/youtu.be.png (this is my local workaround) or do you think it is better to use the same icon for multiple social networks? There may be other social networks that have multiple domains (aliases) and could share the same icon.
That was already fixed in [0c40ae911a3753ff7bddc68047b8cd46a735b57b added some other missing icons.