Since the most important part of almost all Blogger blogs is the posts, the "Blog Posts" gadget is an essential element in the template. Sometimes we have to remove the gadget though - maybe the
gadget is corrupt - or in odd cases, we may have
a duplicate "Blog Posts" gadget.
In either case, the solution is known, and is quite simple.
Remove (the / one) "Blog Posts" gadget.
Unfortunately, not everybody, needing such advice, is able to do this. People using the Template Editor in the New Blogger GUI (2011) may find, to their frustration, that removal of a "Blog Posts" gadget isn't permitted.