Hi Denis,
I am having the same problem with the Mobile Joomla Update to 0.9.11. Here is the error message in error log......
[29-Jan-2011 00:06:07] Caught exception 'Exception' with message 'Error in DB RIS Query: Illegal mix of collations (utf8_general_ci,IMPLICIT) and (utf8_unicode_ci,IMPLICIT) for operation '='.
Query: CALL jos_TeraWurfl_RIS('Mozilla/5.0 (compatible; Googlebot/2.1; +
www.google.com/bot.html)',7,'Bot')
' in /home/folmag/public_html/plugins/mobile/terawurfl/DatabaseConnectors/TeraWurflDatabase_MySQL5.php:116
I ran this command query in sql and it did not work this time.
ALTER TABLE jos_TeraWurflMerge MODIFY user_agent VARCHAR(255) BINARY DEFAULT NULL;
I got a successful message from sql, but the errors still keep coming.
Robin