I'm using netbeans 6.5dev which isn't in the above list.

The ftp upload fails because it is trying to create files on the destination host that are not allowed.

The ftp utility is attempting to upload files named as myfilename.myext.new~ 
example ftp log section :
STOR app.php.new~

553 Filetype not allowed. File app.php.new~ won't be saved.


My filename in this case is app.php and it seems the destination server does not accept files with the added .new~ I can
upload my files with an external tool without a problem.

There is no setting that I can find to turn off the behaviour of adding .new~

Why it needs to do this in the first place mystifies me.