input is always too wide

[mseele]

hi,
i have a problem with a input text. please look at the attached file for 
the problem.
the field should be the same width than the button below, but it's always a 
little bit too wide. 
what i am making wrong?
thx, 
mseele

Title: Enter code

	

		

			

				
enter
			
		
	

	

		
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