sorry for my bad english, please try to understand this.
i have the same problem, this happen in wordpress 3.0 with MULTISITES allowed, and buddypress 188.8.131.52 (and 1.2.5)
you can look the url of this image error is something like “domain-ABSPATH-url-of-your-img” , if your delete the part of abspath,
the url is correctly and the image shows.
then i search in the plugin and i found this.
EDIT & SOLVED (at last for me): in wordpress 3 multisite the abspath change ‘the format’, so you can modify a little line in: