One of the most annoying bugs in Delphi 2007 must be the disappearing Welcome Page. Sometimes, when you do Close All, IDE decides that Welcome Page contains highly sensitive material that is not intended for your eyes, and deletes the contents. Like this:
By trial and error (and much luck) I have found a way to restore it.
Step 1: Click into the edit box next to the 'house' icon. Text (bds:/default.htm) will be selected.
Step 2: Press <Backspace> to delete the text.
Step 3: Press <Enter>. Nothing will happen, but the trick won't work without this.
Step 4: Click the 'house' icon. Welcome Page should reload.
If that doesn't work, you can always close the welcome page and reopen it via View, Welcome Page menu. Is is, however, faster to try click-backspace-enter-click trick first.