In the Schema Browser, if user clicks on the heading to sort Object Owner column, in the Public Synonym section, it causes to hang the program. The Object Owner column does not sort for any Synonyms (private or public) in either the left or the right hand side of Schema Browser.
WORKAROUND:
None
STATUS:
Waiting for fix to be released in a future version of Toad for Oracle
Issue is fixed in the Beta 9.7 release of Toad.