I don't believe this is a bug with xenForo per sé, hence why I have posted in here asking for support, rather than submitting a Bug Report. I have just shared a link to a thread on my Facebook page. If you click this from a computer, it works fine, and takes you to the thread in question. If you click it from the Facebook app on iPhone, however, it results in: I have copy & pasted the link that the Facebook app is actually sending people to, and it seems to have parsed incorrectly. It should be: Code: http://www.mydomain.com/index.php?threads/threadname.14503/ But the Facebook app seems to be sending people to: Code: http://www.mydomain.com/index.php?threads%252Fthreadname.14503%252F I've tried reducing this to just: Code: http://www.mydomain.com/index.php?threads/14503/ Thinking that this would eliminate a lot of the malformed control codes and thus solve the problem, but alas no joy. A friend has tested it on his HTC One M8 and it works fine for him, so it seems to just be iOS (tested on iOS 7 on iPhone 5 and iPad 3). Any suggestions? I appreciate that this is more of a Facebook/Apple bug than xenForo, but I thought some of you resourceful types might have a way round the issue. All I can think of is using a URL shortening service and post the short URL, but I'm not sure if this would even work (e.g. would it present the OG logo, etc.). Any help appreciated; so many users browse on their phones these days, I'd really like to get this sorted! Thanks.