I might have a completely different issue. I just installed MIGX today, didn't do anything with it yet. On restart of FF18, the admin functions of the manager simply weren't available. Click System>Package Management and get nothing but an empty right pane. Same with System Settings. Fortunately I was able to login with IE9 and had access. I completely uninstalled MIGX from IE9, refreshed my FF page, and I was able to access everything again.
I also installed AjaxManager today, and uninstalled TinyMCE since I'm using CKEditor.
The MIGX install showed an error when operating on /assets
//components/migx. Note double slash. I didn't think it was significant. On UNinstall I got this:
Removing files in file resolver: /home/path/assets/components/migx
Removing files in file resolver: /home/path/core/components/migx
Removing files in file resolver: /home/path/assets//components/migx
Could not find files to remove.
Removing files in file resolver: /home/path/core//components/migx
Could not find files to remove.
So maybe that Was significant.
I also noticed that my error log was getting a Lot of logs today but they didn't say MIGX. I got a number of these:
(ERROR @ /connectors/resource/index.php) xPDO->removeObject - Error deleting modDbRegisterMessage instance using query DELETE FROM `modx_register_messages` WHERE ( `modx_register_messages`.`topic` = 1 AND `modx_register_messages`.`id` = 'aaaaaaaaaaaaaaaaaaaa' )
(ERROR @ /connectors/resource/index.php) Could not cache context settings for web.
(ERROR @ /connectors/resource/index.php) xPDO->removeObject - Error deleting modDbRegisterMessage instance using query DELETE FROM `modx_register_messages` WHERE ( `modx_register_messages`.`topic` = 1 AND `modx_register_messages`.`id` = 'aaaaaaaaaaaaaaaaaaaa' )
(ERROR @ /connectors/resource/index.php) Error 23000 executing statement:
INSERT INTO `modx_register_messages` (`topic`, `id`, `created`, `valid`, `accesses`, `expires`, `payload`, `kill`) VALUES (1, 'aaaaaaaaaaaaaaaaaaaa', '2013-01-20 18:39:41', '2013-01-20 18:39:41', 0, 1358736341, 'if (time() > 1358736341) return null;\nreturn 1;\n', 0)
Array
(
[0] => 23000
[1] => 1062
[2] => Duplicate entry '1-aaaaaaaaaaaaaaaaaaaa' for key 'PRIMARY'
)
(ERROR @ /connectors/resource/index.php) Could not send message to queue 1, topic /resource/. Message payload is Array
(
[aaaaaaaaaaaaaaaaaaaa] => 1
)
(ID cleared intentionally)
I'll try MIGX later, don't need it right now.
HTH