BuddyPress.org

Are you using the old default BP themes or the new parent/child defaul BP theme architecture?

The old two-theme system relied on the bphome theme residing in /wp-content/themes/ and the bpmember theme residing in /wp-content/bp-themes/. If you still have those theme files try this:

• Make sure that you have moved the new theme files into their proper location as detailed here in step 4 of the section entitled, “Installing BuddyPress”
• Then, do as instructed in step 5 of the above link
• If you are stilling having issues, you may need to remove the old default BP theme files