http://bugs.winehq.org/show_bug.cgi?id=25708
--- Comment #12 from gherardo gherardo@yahoo.com 2011-02-15 01:47:54 CST --- User philnice on ubuntuforum ( http://ubuntuforums.org/showthread.php?p=10459871#post10459871 ) pointed me to the answer.
He found in /var/lib/binfmts a file named "wine". Its content was (for me) the following (without -------):
----------------------- wine1.0 magic 0 MZ
/usr/bin/wine ----------------------- I moved the file elsewhere and a new wine 1.2 installation worked smoothly.