I have disabled (and uninstalled) the comments module in my d7 installation since I don't need it. However, this will cause an exception similar to this because the "comments" table was deleted from the DB:

PDOException: SQLSTATE[42S02]: Base table or view not found: 1146 Table 'xxx.comment' doesn't exist: SELECT COUNT(*) FROM {comment} WHERE nid = :A; Array ( [:A] => 14 ) in _icl_wrapper_db_query() (line 732 of <path>/sites/all/modules/translation_management/icl_core/icl_core.wrapper.inc).

For a quick fix I've edited icl_content_show_translated_comments and added a call to "module_exists" to its beginning:

if (module_exists('comments') && variable_get ('icl_content_comment_view', 1)) {

instead of 

if (variable_get ('icl_content_comment_view', 1)) {

Please have a look whether this is a bug or maybe I've done something wrong (I don't think so right now).