Hi Marco,
I think the problem is the same that I'm having with latest version (11.0.3.1770).
using a test window to debug a procedure, after the first run, several tabs are displayed, showing the code of debugged procedures/packages.
After the first test, when I reinstall package from SQL*Plus in one other session, I "Add debug infromation", but the code shown in tabs remains the original one, the only way to refresh code (and line numbers too) is to close and reopen test window.
Only now I've found the "close window..." option in context menu,
A simple ("X") to close the tab or a refresh button on the tab will help.
Let me know if You need additional details.
Thanks
Max