Yes, this link works fine. Can you confirm if all these setting should make it work correctly? I have the same settings in admin/default/guest config files. 

 

 <security name="RestrictUploadedImageDimension">true</security>
 <security name="OverWriteExistingUploadedFile">false</security>
 <security name="UseTimeStampRenameUploadedFiles">false</security>
 <security name="AutoResizeUploadedImages">false</security>
 <security name="MaxImageWidth">1024</security>
 <security name="MaxImageHeight">1024</security>
 <security name="MaxImageSize">10000</security>

 

Thanks,

Kamran