Apparently, last.fm's software is too simplistic to realize that in classical music, we often list the composer's LAST NAME first for purposes of easy indexing.
But to last.fm, "Respighi, Ottorino" and "Ottorino Respighi" are two different people.
I guess there may be a handful of rock bands that use commas in their names, but it is not rocket science to set up an equivalency table and when a comma is found, check out.
Instead, last.fm has opted for the ignorant and offensive step of telling us we need to "fix" our tags -- putting us out of line with the classical community and world in general -- to accomodate their incompetent software.
What is this retardation?