I recently realized that what you set under reading settings for "blog pages show at most __ posts" applies for both your blog AND the blog's archives.
This is slightly inconvenient since, in the blog you only want a few posts showing at once (in full length), while in archives you want a lot of posts titles shown at once (with my format, at least, it only shows the title in the archives). So it defeats the purpose when both have to be set to the same number.
What I'm suggesting is that the setting can be split, one number for posts show on blog, one for posts shown in archives. It seems simple enough, but would make peoples lives much easier, I believe.
Thanks for taking the time to read .. sorry for the incoherency! ^__^"