We have setup the Guest user group so that they cannot view members profiles, a very common configuration.
Because of this, the profile images at the blog are not visible to guests.

Could have been a setting for this in the blog group setup, something like: "Let groups that cannot view profiles to view profile image."

Catch 20/20 cause it was designed this way, but with respect to the Blog should be considered a oversight/bug because members technically should have say over who can view there blog which includes the profile pic. May a if member has a blog then guest settings are overidden by user blog settings.

Quick fix... Allow guest(s) to view profiles

http://forums.invisionpower.com/index.php?...;showissue=8320

Well its smart but silly at the same time. The member should choose who can see their personal photo.

The blog view profile pic should be totally separate from IPB permissions. That's actually lame the way it is now. If I would have seen that post, I most likely would have voted against it. Reason is simply because I feel blog owner should have control over who can view his blog or blog pics. The IPB is a completely separate entity which the admin controls such things as not wanting guests to view profiles because some of them could be spammers or something. But this should not affect blog owners blogs as they are the ones who should decide if the blog or blog profile pic is viewable by guests or not.

That was my point. Most probably there are many more guest than members who read the blogs, and the blog pic can be an important factor in presenting yourself at the blog frontpage. Without any images the frontpage looks pretty dull to guests.