Apex stopped work with error
Thu Jan 24 10:29:45 2013
Errors in file c:\oracle\product\10.1.0\admin\su30drw\udump\su30drw_ora_9196.trc : ORA-00600: internal error code, arguments: [ktspgetmyb-1], , , , , , [
],  ORA-06512: at "FLOWS_030100.F", line 279 ORA-06512: at line 55
Go to your DBA, let him/her look at the trace files, alert log etc.
Probably some kind of corruption of your database files.
Has nothing to do with APEX - you might as well get the same/similar errors when doing something in SQLPlus ...