Original post on tablet, android 4.4.2
Edit on phone to add picture.
I just checked on tablet trying to add pic to Moroccan thread and same message about chrome.
Tried with tablet on crackling thread and it worked okay.
OK - that is really useful information. I am going to have to eat my words about all threads being the same. Over to you @SatNavSaysStraightOn!
I thought you set up the Challenges sub-forum @SatNavSaysStraightOn but maybe not. Why would anything be set differently in a particular sub-forum regarding uploading files?