Upload failing on iOS9.3 (Expecting a file upload)

[Craig S.28]

Just started getting customer reports that uploads from my app are failing.

Tried it myself and it works ok on iOS9.2 but not on iOS9.3 ?

The error I'm getting from Dropbox is 400 and JSON containing the following:

"Expecting a file upload"

I receive this AFTER apparently uploading the whole file (I see all the callback indications after each lump of data has been sent.)

Not sure if this is related to iOS9.3 or something at the Dropbox end (my app has not changed in years....)

Anyone else seeing the same.

Thanks.

PS: Using the core api v2 and NSURLConnection

[Freddie L.2]

We will be using cURL for now on and will not be testing the previous way. Fixing this was a pain and messed up our Easter holiday.