BuddyPress.org

In WordPress 3.5+ the upload avatar core doesn’t not work. The following function needs to be changed from:

// Check image size and shrink if too large
if ( $size[0] > bp_core_avatar_original_max_width() ) {
$thumb = wp_create_thumbnail( $bp->avatar_admin->original, bp_core_avatar_original_max_width() );

to this:

// Check image size and shrink if too large
if ( $size[0] > bp_core_avatar_original_max_width() ) {
$thumb = image_resize( $bp->avatar_admin->original, bp_core_avatar_original_max_width(), null );

Or something like that, it would probably be better to not pass a null parameter but it works.

In WP 3.5+ wp_create_thumbnail is deprecated.