From what I gather, others are using Gallery2 or the not-updated-for-CB 1.2-yet CB Gallery plugin. It works, but note the fix here in the forums for the 'pglasupdate' syntax error.
I just can't find a fix for the Profile Gallery. I waited for RC3, thinking it would be included, and that didn't fix the profile gallery image just bringing up the light box but not displaying the photo.
I tried Nants Profile Gallery RC-Moo. but got the same result?
I still see many people having this problem but no clear solution
Profile Gallery Images not displaying. Just the white shell of lightbox.