Notice: Undefined index: name in token_asort_tokens() (line 572 ...)

On every cache flush imagecache_token_token_info_alter is called which alters the type of every field of type 'image' to read 'image-field'. The minor issue here is it doesn't check for token existence prior to altering the type thus creating a new token array value of array('type' => 'image-field'), which is obviously missing the name property that's required. The attached patch fixes the issue.