If you are asking about the upload of images in the Images & Documents module, the answer is yes, you can do that by putting all the images you need to upload in a .zip first and then upload the zip. Please provide more details if this is not exactly what you mean.
As for the problem with posting in different threads, can you please elaborate a bit more?
Can you start new threads? Is the New Thread
button at the bottom of the page visible? Do you get any errors when you click it?
For example, when you go here: http://www.sitefinity.com/support/forums/support-forum-thread/b1043S-bdbadm.aspx
, can you see the Reply
button? You use it to create a new post to an existing forum topic.
All the best,
the Telerik team