New tab problem

[y_0rk3r at o2.pl]

Hi!  
everytime I open the new tab I get that stupid  that stupid 
Document Relations ( or something ) taskbar on the left.. it's 
really annoying when you open let's say 5 tabs and got no more 
free space left. 
here's what I mean : http://priv.ckp.pl/mistery/1.jpg  
can you tell me how to close them and make never appear again ? :) 
thanks 

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