I experienced similar problems to this, with the 0.9.2 release on a Win32 box (MySQL=STRICT)
I say similar, mine were an inability to add templates, snippets, chunks etc as described in
http://modxcms.com/forums/index.php/topic,4573.0.html
and in
http://modxcms.com/forums/index.php/topic,4603.0.html
I did NOT stop MySQL running in strict mode, but modified the setup.sql file so that every field with NOT NULL specified has a default value (I used ’’ or 0 depending if char or numeric’.
Of course I then lost the sql file after the install when the manager deleted the install folder :’(, but could soon re-create it if necessary. Since then have had no problems yet with strict mode.