ksort() expects parameter 1 to be array

OK -- I think it is definitely the CCK Notifications module that was causing the trouble. I had it set up to check for a node reference field, and I think it tried to find the value in the a large part of the node object instead of the value field. See the serialized object in the query? I bolded the part right before it starts.

Maybe this is bug... or maybe I'm looking at the wrong problem...

Here was the error I got:

user warning: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '))) GROUP BY s.uid, s.mdid, s.send_method, s.sid, s.module, s.send_interval, s.c' at line 1 query: INSERT INTO notifications_queue (uid, mdid, send_method, sid, module, eid, send_interval, language, cron, created, conditions) SELECT DISTINCT s.uid, s.mdid, s.send_method, s.sid, s.module, 6, s.send_interval, s.language, s.cron, 1274633722, s.conditions FROM notifications s LEFT JOIN notifications_fields f ON s.sid = f.sid WHERE (s.status = 1) AND (s.event_type = 'node') AND (s.send_interval >= 0) AND ((f.field = 'tid' AND f.intval IN (35,40,14,16,30,11)) OR (f.field = 'nid' AND f.intval = 282) OR (f.field = 'type' AND f.value = 'post') OR (f.field = 'author' AND f.intval = 3) OR (f.field = 'event-action' AND f.value = 'insert') OR (f.field = 'field_site_content' AND f.value IN ('a:1:{s:3:\"nid\";s:3:\"251\";}')) OR (f.field = 'field_date' AND f.value IN ('a:7:{s:9:\"date_type\";s:4:\"date\";s:6:\"offset\";s:6:\"-25200\";s:7:\"offset2\";s:6:\"-25200\";s:8:\"timezone\";s:16:\"America/Edmonton\";s:11:\"timezone_db\";s:3:\"UTC\";s:5:\"value\";s:19:\"2009-12-22T03:46:00\";s:6:\"value2\";s:19:\"2009-12-22T06:26:00\";}','a:7:{s:9:\"date_type\";s:4:\"date\";s:6:\"offset\";s:5:\"21600\";s:7:\"offset2\";s:5:\"21600\";s:8:\"timezone\";s:11:\"Asia/Almaty\";s:11:\"timezone_db\";s:3:\"UTC\";s:5:\"value\";s:19:\"2005-01-10T15:13:00\";s:6:\"value2\";s:19:\"2005-01-10T18:03:00\";}')) OR (f.field = 'field_file' AND f.value IN ('a:12:{s:4:\"data\";a:10:{s:8:\"duration\";i:0;s:6:\"height\";i:225;s:5:\"width\";i:224;s:18:\"audio_bitrate_mode\";s:0:\"\";s:18:\"audio_channel_mode\";s:0:\"\";s:12:\"audio_format\";s:0:\"\";s:13:\"audio_bitrate\";i:0;s:17:\"audio_sample_rate\";i:0;s:3:\"alt\";s:52:\"Dolus ymo vero comis causa molior luptatum aliquam. \";s:5:\"title\";s:128:\"Jumentum dolus caecus caecus laoreet ad valde voco oppeto. Iusto similis lenis refero laoreet paratus valde euismod appellatio. \";}s:11:\"destination\";s:39:\"sites/main/files/filefield_FSrNTT_1.png\";s:3:\"fid\";s:5:\"13399\";s:8:\"filemime\";s:9:\"image/png\";s:8:\"filename\";s:22:\"filefield_FSrNTT_1.png\";s:8:\"filepath\";s:39:\"sites/main/files/filefield_FSrNTT_1.png\";s:8:\"filesize\";i:1032;s:4:\"list\";i:1;s:6:\"source\";s:20:\"field_file_save_file\";s:6:\"status\";i:1;s:9:\"timestamp\";i:1274633720;s:3:\"uid\";s:1:\"1\";}','a:12:{s:4:\"data\";a:10:{s:8:\"duration\";i:0;s:6:\"height\";i:0;s:5:\"width\";i:0;s:18:\"audio_bitrate_mode\";s:0:\"\";s:18:\"audio_channel_mode\";s:0:\"\";s:12:\"audio_format\";s:0:\"\";s:13:\"audio_bitrate\";i:0;s:17:\"audio_sample_rate\";i:0;s:3:\"alt\";s:49:\"Ideo magna quadrum blandit quidne torqueo premo. \";s:5:\"title\";s:64:\"Augue ut aptent exputo camur patria iusto. Feugiat te suscipit. \";}s:11:\"destination\";s:39:\"sites/main/files/filefield_TqxowZ_8.txt\";s:3:\"fid\";s:5:\"13400\";s:8:\"filemime\";s:10:\"text/plain\";s:8:\"filename\";s:22:\"filefield_TqxowZ_8.txt\";s:8:\"filepath\";s:39:\"sites/main/files/filefield_TqxowZ_8.txt\";s:8:\"filesize\";i:1024;s:4:\"list\";i:1;s:6:\"source\";s:20:\"field_file_save_file\";s:6:\"status\";i:1;s:9:\"timestamp\";i:1274633720;s:3:\"uid\";s:1:\"1\";}')) OR (f.field = 'field_slideshow_images' AND f.value IN ('a:12:{s:4:\"data\";a:10:{s:8:\"duration\";i:0;s:6:\"height\";i:271;s:5:\"width\";i:500;s:18:\"audio_bitrate_mode\";s:0:\"\";s:18:\"audio_channel_mode\";s:0:\"\";s:12:\"audio_format\";s:0:\"\";s:13:\"audio_bitrate\";i:0;s:17:\"audio_sample_rate\";i:0;s:3:\"alt\";s:47:\"Fere ymo suscipit olim nutus meus saluto eros. \";s:5:\"title\";s:101:\"Turpis refoveo neque eum fere cogo eu duis. Esse immitto te utinam oppeto sagaciter brevitas aptent. \";}s:11:\"destination\";s:39:\"sites/main/files/filefield_Hcm194_3.jpg\";s:3:\"fid\";s:5:\"13401\";s:8:\"filemime\";s:10:\"image/jpeg\";s:8:\"filename\";s:22:\"filefield_Hcm194_3.jpg\";s:8:\"filepath\";s:39:\"sites/main/files/filefield_Hcm194_3.jpg\";s:8:\"filesize\";i:6849;s:4:\"list\";i:1;s:6:\"source\";s:20:\"field_file_save_file\";s:6:\"status\";i:1;s:9:\"timestamp\";i:1274633720;s:3:\"uid\";s:1:\"1\";}','a:12:{s:4:\"data\";a:10:{s:8:\"duration\";i:0;s:6:\"height\";i:561;s:5:\"width\";i:545;s:18:\"audio_bitrate_mode\";s:0:\"\";s:18:\"audio_channel_mode\";s:0:\"\";s:12:\"audio_format\";s:0:\"\";s:13:\"audio_bitrate\";i:0;s:17:\"audio_sample_rate\";i:0;s:3:\"alt\";s:60:\"Cui dolor appellatio saluto gilvus paratus ratis ratis qui. \";s:5:\"title\";s:121:\"Letalis brevitas amet tum. Verto scisco abigo quadrum molior. 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Nisl luctus exerci tincidunt esse olim scisco singularis. \";}s:11:\"destination\";s:39:\"sites/main/files/filefield_FSrNTT_2.png\";s:3:\"fid\";s:5:\"13403\";s:8:\"filemime\";s:9:\"image/png\";s:8:\"filename\";s:22:\"filefield_FSrNTT_2.png\";s:8:\"filepath\";s:39:\"sites/main/files/filefield_FSrNTT_2.png\";s:8:\"filesize\";i:1032;s:4:\"list\";i:1;s:6:\"source\";s:20:\"field_file_save_file\";s:6:\"status\";i:1;s:9:\"timestamp\";i:1274633720;s:3:\"uid\";s:1:\"1\";}','a:12:{s:4:\"data\";a:10:{s:8:\"duration\";i:0;s:6:\"height\";i:561;s:5:\"width\";i:545;s:18:\"audio_bitrate_mode\";s:0:\"\";s:18:\"audio_channel_mode\";s:0:\"\";s:12:\"audio_format\";s:0:\"\";s:13:\"audio_bitrate\";i:0;s:17:\"audio_sample_rate\";i:0;s:3:\"alt\";s:68:\"Euismod ea lucidus meus ullamcorper lucidus et valetudo sino nobis. \";s:5:\"title\";s:92:\"Commoveo velit virtus. Occuro quadrum proprius pala uxor gilvus. 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Caecus uxor vicis neque. \";}s:11:\"destination\";s:39:\"sites/main/files/filefield_DJUhEx_3.jpg\";s:3:\"fid\";s:5:\"13405\";s:8:\"filemime\";s:10:\"image/jpeg\";s:8:\"filename\";s:22:\"filefield_DJUhEx_3.jpg\";s:8:\"filepath\";s:39:\"sites/main/files/filefield_DJUhEx_3.jpg\";s:8:\"filesize\";i:7484;s:4:\"list\";i:1;s:6:\"source\";s:20:\"field_file_save_file\";s:6:\"status\";i:1;s:9:\"timestamp\";i:1274633720;s:3:\"uid\";s:1:\"1\";}')) OR (f.field = 'field_destination' AND f.value IN ('a:1:{s:5:\"value\";N;}')) OR (f.field = 'field_profiles' AND f.value IN ('a:1:{s:3:\"nid\";s:3:\"216\";}','a:1:{s:3:\"nid\";s:3:\"241\";}')) OR (f.field = 'field_link' AND f.value IN ())) GROUP BY s.uid, s.mdid, s.send_method, s.sid, s.module, s.send_interval, s.cron, s.conditions HAVING s.conditions = count(f.sid) in /home/dirtchip/www/www/current/sites/all/modules/notifications/includes/notifications_queue.class.inc on line 751.

hi...............
as well as I stop receiving messages altogether. No other errors, however. I'll see if I can find out more...
=============================
deepak