Warnings during runtime

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What steps will reproduce the problem?
1. Run grails application with logging on

What is the expected output? What do you see instead?
I expect not to see a warning. I see such warnings: 
util.GrailsUtil [WARNING] Property [data] of domain class 
pl.burningice.plugins.image.ast.Image has type [[B] and doesn't support 
constraint [blank]. This constraint will not be checked during validation.
config.ConfigurationFactory No configuration found. Configuring ehcache from 
ehcache-failsafe.xml  found in the classpath: 
jar:file:/home/cygi/.ivy2/cache/net.sf.ehcache/ehcache-core/jars/ehcache-core-1.
7.1.jar!/ehcache-failsafe.xml
scaffolding.DefaultGrailsTemplateGenerator Scaffolding template generator set 
to use resource loader 
org.codehaus.groovy.grails.commons.spring.GrailsWebApplicationContext@62363bce: 
startup date [Mon Jan 03 13:13:52 CET 2011]; parent: Root WebApplicationContext
util.GrailsUtil [WARNING] Property [data] of domain class 
pl.burningice.plugins.image.ast.Image has type [[B] and doesn't support 
constraint [blank]. This constraint will not be checked during validation.
context.GrailsConfigUtils [GrailsContextLoader] Grails application loaded.

What version of the product are you using? On what operating system?
Ubuntu, burningimage 0.5.0

Original issue reported on code.google.com by Cygan.Kr...@gmail.com on 3 Jan 2011 at 12:17

[GoogleCodeExporter]

With version of grails are you using?

Original comment by gdula.pawel@gmail.com on 3 Jan 2011 at 1:04

[GoogleCodeExporter]

grails 1.3.6

Original comment by Cygan.Kr...@gmail.com on 3 Jan 2011 at 1:21