Idea Avatar upload in edit profile not working

sozzled wrote: As you know, K 1.6.4 is not supported. I suggest that you try with K 1.7.0. We also suggest that you try using the standard Blue Eagle template to see if this makes a difference. Thank you.

Updated Kunena to version 1.7. Still the same issue.

Could i be missing some sort of php extension on the server. What does Kunena used to resize images?

Did you actually try removing Artio SEF completely? Obviously this isn't something you want to do on your production site, but have you tried these things on a test site? To answer your question Kunena uses whatever graphics handler that's installed with your webhosting software to perform on-the-fly image resizing.

Let's go back to your original question. "303 redirect error" ... doesn't that suggest something about how your site is routing URLs? That's why I would seriously investigate what's happening with Artio SEF. In the end it may come down to a choice between which is more important: Artio SEF or Kunena.