How to replicate:
add Dictionary applet to panel
search for a word 
leave the dictionary window open and logout gnome, saving current session
login
the dictionary window is displayed with a dialog that word was not found (
gnome-dictionary-ASDGAahaksda )
(1st bug - should save the right word which was entered by user)
close all dictionary windows ( leaving the applet )
logout gnome, saving session
login
again the dictionary window is displayed with a dialog that word was not found (
gnome-dictionary-ASDGAahaksda )
(2nd bug - shouldn't start dictionary windows, just applet)

I'm using a clean install of phoebe2