I cannot trace nor analyze a statement under 4.2 when i can with 4.1.
I have the same behaviour for a simplified test case:
SELECT someschema.somepackage.somefunction@remote_db( arg ) FROM dual;
Under 4.2EA i can execute (Ctrl-Enter) but trace (F6) or explain (F10) end up in ORA-00911: invalid character
Win7, 64 bits, connected to the same db with the same account under both sqldev versions.