NoMethodError when creating new ActiveRecord model object

the strangest thing is happening...i'm not getting this every time,
maybe 1/3 of the time, identical requests...

i'm a rails newbie, but i think i'm trying pretty standard stuff, this
is an excerpt from the log:

----------------------

...

NoMethodError (undefined method `email_config_id=' for
#<EmailRecipient:0x463caa0 @new_record=true, @attributes={}>):

...

--------------------------

-------------------------

my tables:

...

db2 => describe table whitecap.email_recipients

EMAIL_CONFIG_ID SYSIBM INTEGER 4

I've never used the db2 adapter, but is there perhaps a case
sensitivity issue in play here?

What happens if in script/console you enter EmailRecipient.column_names

Strange! If you figure this out, please let us know. Sorry but I'm
out of ideas at the moment.