Blogger blues

Is there any particular reason why edits and comments to my posts sometimes take more than half a day to become visible on this blog's homepage? It drives me nuts when I respond to a comment and no one except me can see any change, not to mention that it's embarrassing enough when I publish a spelling error, but even worse when the error is still visible six hours after I've corrected it.

(I'm publishing this at 3:05 PM. When Blogger will publish it, I haven't a clue. Sigh.)