Hello,
In latest releases of SQL*Dev 'Incremental Find Forward' and 'Incremental Find Backward' shortcuts bring standard search box, not the floating window.
It completely disables 'Incremental Find Backward'. When one presses Ctrl+Shift+E and then types anything in the search box the cursor jumps to the next occurrence not the previous.
Incremental find was a great feature greatly improving productivity and now it's completely missing.
Plus aforementioned commands are now missing from Edit menu (please see this post http://www.thatjeffsmith.com/archive/2012/05/sql-developer-incremental-find-via-ctrl-e/ by Jeff Smith).