Is it Yahoo, or is it Blogger?

Is it Yahoo, or is it Blogger?

Why oh why is it not possible to make it so that blogs and web hosting services work well together? Today we've run across the problem that blogger is unable to upload our blog to our website hosted on Yahoo. The issue, Yahoo no longer allows files with spaces in the name. Blogger is creating index files for the labels on the post as is (including any spaces between words).

What makes a file with a space in its name so offensive that Yahoo doesn't allow us to FTP it up to the website? Are they trying to force us to use their tools? Is Blogger just being lazy about file naming?

If anyone has answers to these questions, please let me know.