SQL Developer 3.0.04 deleted contents of many tables mystically!!!

Question

I just upgraded SQL Developer 3.0.04 on Windows XP with dual core and SSD drive. Database is 10g. I was clicking on data content tab and looking at one table from database, but it suddenly reported an error like "no more data...".
I thought my connection was dropped (I am using port forwarding tunnel to connect to database). I disconnect and reconnect to database, but suddenly I found more than 10 tables have been emptied. All data in those tables were DELETED!!! Some tables were left untouched.
It must be a huge bug in SQL Developer. I have been using it for three years. It used to be just slow, but never did something like this.
William

Answer 1

Luckily, it's not happening to our prod database. It is still scary, so I investigated a little bit more. This is what I found from v$sql. At that time range, some weird delete statements were issued to our database as follows. We definitely don't have any tables or views with those names. Anyone has an idea what those sqls are about?
SQL_TEXT first_load_time
delete from dir$ where obj#=:1     2011-04-13/19:16:03
delete from dir$ where obj#=:1     2011-04-13/19:16:03
delete from opbinding$ where obj#=:1     2011-04-13/19:16:03
delete from opbinding$ where obj#=:1     2011-04-13/19:16:03
delete from oparg$ where obj# = :1     2011-04-13/19:16:03
delete from oparg$ where obj# = :1     2011-04-13/19:16:03
delete from triggercol$ where obj#=:1     2011-04-13/19:16:03
delete from triggercol$ where obj#=:1     2011-04-13/19:16:03
delete from triggercol$ where obj#=:1     2011-04-13/19:16:03
delete from cdef$ where con#=:1     2011-04-13/19:16:03
delete from cdef$ where con#=:1     2011-04-13/19:16:03
delete from javaobj$ where obj#=:1     2011-04-13/19:16:03
delete from javaobj$ where obj#=:1     2011-04-13/19:16:03
delete from procedure$ where obj#=:1     2011-04-13/19:16:03
delete from procedure$ where obj#=:1     2011-04-13/19:16:03
delete from procedure$ where obj#=:1     2011-04-13/19:16:03
delete from trigger$ where obj#=:1     2011-04-13/19:16:03
delete from ccol$ where con#=:1     2011-04-13/19:16:03
delete from ccol$ where con#=:1     2011-04-13/19:16:03
delete from com$ where obj#=:1     2011-04-13/19:16:03
delete from com$ where obj#=:1     2011-04-13/19:16:03
delete from triggerjavas$ where obj#=:1     2011-04-13/19:16:03
delete from triggerjavas$ where obj#=:1     2011-04-13/19:16:03
delete from triggerjavam$ where obj#=:1     2011-04-13/19:16:03
delete from triggerjavam$ where obj#=:1     2011-04-13/19:16:03
delete from type_misc$ where obj#=:1     2011-04-13/19:16:03
delete from type_misc$ where obj#=:1     2011-04-13/19:16:03
delete from error$ where obj#=:1     2011-04-13/19:16:03
delete from error$ where obj#=:1     2011-04-13/19:16:03
delete from context$ where obj#=:1     2011-04-13/19:16:03
delete from context$ where obj#=:1     2011-04-13/19:16:03
delete from settings$ where obj# = :1     2011-04-13/19:16:03
delete from settings$ where obj# = :1     2011-04-13/19:16:03
select name,owner# from con$ where con#=:1     2011-04-13/19:16:03
delete from triggerjavac$ where obj#=:1     2011-04-13/19:16:03
delete from triggerjavac$ where obj#=:1     2011-04-13/19:16:03
delete from opancillary$ where obj#=:1     2011-04-13/19:16:03
delete from opancillary$ where obj#=:1     2011-04-13/19:16:03
delete from library$ where obj#=:1     2011-04-13/19:16:03
delete from library$ where obj#=:1     2011-04-13/19:16:03
delete from triggerjavaf$ where obj#=:1     2011-04-13/19:16:03
delete from triggerjavaf$ where obj#=:1     2011-04-13/19:16:03
delete from viewcon$ where robj#=:1     2011-04-13/19:16:03
delete from operator$ where obj#=:1     2011-04-13/19:16:03
delete from operator$ where obj#=:1     2011-04-13/19:16:03
Thanks,
William