Fixed in CVS already: 
http://cvs.horde.org/diff.php/framework/Horde/Horde/Config.php?r1=1.87&r2=1.88&ty=u

i have mysql user without password, and time to time when i save horde 
configuration using web frontend, it puts asterisks to the password 
field:



$conf['sql']['password'] = '*****';



this can be resolved, if i clear the password field prior save.



if i look html source, then after save (and reopening configuration) 
it contains the asterisks:



<input type="text" name="sql__password" size="40" value="*****" 
id="sql__password" />.



i expect if i clear the password, it's kept that way.