<p>Take a look at the University of Wisconsin, Madison site with their Writing Center’s Style Guide:
[uw-madison</a> writing center writer’s handbook](<a href=“http://writing.wisc.edu/Handbook/Semicolons.html]uw-madison”>Using Semicolons – The Writing Center – UW–Madison)
It’s not really a big deal. But Strunk and White’s Elements of Style contains sentences starting with “But.”</p>