Locator Fields and Object Metadata Cache

If you enter data into a text locator field and as soon as you tab out the value you selected disappears, you may want to flush the Object Metadata Cache before restarting Jboss or Weblogic. I have seen this several times with the TRIRIGA 9 application where I select a valid value from a locator query and as soon as I click OK on the query with field wipes itself out. A restart would solve the problem, but a cache flush is faster and does not disrupt the end users.