Rails - May 2006 - Not working validation

Hi there,
I have some model classes where I''ve tested successful that validation 
worked. After some more days of iterations I found that that validation 
isn''t working anymore. The validation functions are not even called. 
Example:

class Company < ActiveRecord::Base
	validates_uniqueness_of :name
	validates_numericality_of :money
	
	validates_each :money do  |record, attr, value|
		record.errors.add( attr, "darf nicht unter 0 sinken.") \
                if value < 0.0
	end

         # more code

That''s not the only class for which the validation isn''t
working
anymore. I''ve tested the validation by calling save! on an invalid 
object and expected that an exception will be thrown. What might cause 
the disabling of the validations? Any hints, pointer?

Many thanks in advance and best regards
Torsten

I removed all files with an .rb~ extension. I thought they where from my
editor (jEdit), but after I removed them the validations are performed
again. Hm, wired.

best regards,
Torsten