Something weird hapened suddenly with K2 attachments,
some of the attachmnents (pdf, word files) are corrupted (we can not open the them) when we download them from the frontend
From the back end, everything works normally.

I guess k2 doesnt change the files, so how can this happen?
Can this be caused by the hosting server? (OVH)

Thanks for help,

I have found a solution, hopefully it is ok,
it looks to be working:
www.joomlaworks.net/forum/k2-en/19111-fixed-k2-attachement-function-still-broken


placed " ob_end_clean(); " within function download() in components/com_k2/controllers/item.php :


function download()
{

require_once (JPATH_COMPONENT_ADMINISTRATOR.DS.'models'.DS.'item.php');
ob_end_clean(); // added
$model = new K2ModelItem;
$model->download();
}

Which version of K2 and Joomla! where you using?