In the past week or so (early April), we've had several members contact us to report that they have been unable to upload images to our galleries; the upload would hang, sometimes reporting a timeout error, sometimes with no error message.  It appears that a recent update to the Safari web browser - the default for Apple systems - is the cause of this behaviour.  Our advice to Safari users who experience this problem is to change to an alternative web browser; we recommend either Chrome or Firefox.