This framework is outdated and doesn't support all kind of files to upload, so i decided to fix the framework.
In the class Zend_Gdata_Docs
I did this by adding the entry JPG/JPEG/PPTX
private static $SUPPORTED_FILETYPES = array(
'JPG'=>'image/jpeg',
'JPEG'=>'image/jpeg',
'TXT'=>'text/plain',
'CSV'=>'text/csv',
'TSV'=>'text/tab-separated-values',
'TAB'=>'text/tab-separated-values',
'HTML'=>'text/html',
'HTM'=>'text/html',
'DOC'=>'application/msword',
'ODS'=>'application/vnd.oasis.opendocument.spreadsheet',
'ODT'=>'application/vnd.oasis.opendocument.text',
'RTF'=>'application/rtf',
'SXW'=>'application/vnd.sun.xml.writer',
'XLS'=>'application/vnd.ms-excel',
'XLSX'=>'application/vnd.ms-excel',
'PPT'=>'application/vnd.ms-powerpoint',
'PPTX'=>'application/vnd.ms-powerpoint',
'PPS'=>'application/vnd.ms-powerpoint');
It's working fine for the .pptx and for the jpeg/jpg the upload is working completely fine but once in Google Docs it is showing like a doc...
There: