The following bug has been logged on the website:
Bug reference: 6543
Logged by: Cleberson
Email address: kebe(dot)1969(at)gmail(dot)com
PostgreSQL version: 9.1.3
Operating system: Windows 7
Description:
When you create a column name with uppercase ( idCustomer ) you can´t
define a filter to thi col, because internaly de pgadmin converts the name
to ( idcustomer ) and show an error that the column does not exist.