Nevermind, saw a bug report for this issue. Not sure how I missed it the first time. Couldn't find a way to delete this thread. Mods, please remove this. Thanks!
When I upgraded from 2.1 to 3.2.1, the WHEN clause in a trigger disappeared from view. In its place was a blank line.
Upgrading from 3.2.1 to 3.2.2 took away the blank line but still kept the WHEN clause hidden.
Downgrading from 3.2.2 to 3.1 displayed the WHEN clause again.
This was on 11g.
Edited by: user1085544 on Nov 12, 2012 3:55 PM