Currently boolean values in log4php.properties have to be written as "true" and "false", i.e. as strings because they do not get parsed correctly else.
This is quite irritating as the ini file format as well as the name of the configurator suggests that this file does behave like a PHP .ini file where true/false/on/off etc. can be used.
Moreover it is no problem with log4j and the properties files should be interchangeable if possible.
As I was bitten by this bug myself for the third time now I tried to fix it
The patch currently only fixes LoggerLayoutTTCC and most probably breaks a whole lot of other stuff but it shows the right way, I guess.