Only the Immigration Office can give you a definitive answer. As far as I am aware it isn't a bar on it's own, but will be weighed up against everything else to establish if you are a "person of good bearing".
My opinions are merely that .. opinions based on experience. Always seek professional advice.
IVA Completed 23rd July 2013 .... C.C. 10th January 2014 http://foggy.blogs.iva.co.uk