WordPress MU

Has anyone find a solution? In http flash upload works OK, but in https, gets IO Error....

It would be helpful if you provided some details. The version of mu you;re running, the specific error you;re receiving, etc. A quick google shows a number of discussions and solutions but they depend on the specific error you're receiving.

http://codex.wordpress.org/Debugging_WPMU

I use camino on a mac.

As I discovered this is a known problem of FLASH itself with some browsers over https protocol

(see for example

http://bugs.adobe.com/jira/browse/FP-201)

I understand that this is not really a WP problem , nevertheless it would be very nice if WP team could do smth about it..

I nearly can not use uploads... To upload a hundred files one by on? No..

If there is a (simple) solution - i.e. by manually editing a php file, it would be miracle!

Or, alternatively, I can use ftp upload, but how can I tell the WP that those files are the attachments to that particular post? (to use them, for example, in a gallery) ?

Thanks for this post; I'm having the same issue with https, flash and the file uploader. You saved me a lot of frustrating code delving.

As a bulk upload solution, you could try using NextGEN gallery, which supports ZIP file uploads.
http://wordpress.org/extend/plugins/nextgen-gallery/