In reply to Shapehifter 3.

@Shapehifter 3,

My choice of software tends to depend on the length of the post. If it's going to be short, then I like the blogging client, QTM. You can then upload posts with a simple click.

If the post is going to be longer, I use either LyX with the eLyXer and LyXBlogger extensions, or NoteCase Pro with hermocom's Document Tools extension.

Unless you already know LaTeX, NoteCase Pro is easier to use than LyX, but you need to copy and paste from it to get the text into WordPress. (I use hermocom's Document Tools extension to convert each rich text note to HTML, and then copy that into the WordPress HTML editor. This gives perfect control.)

You can also export from NoteCase Pro to LaTeX and then import into LyX if you later decide to use LyX instead. LyX has the advantages that it produces superb PDFs, handles images and formulae with ease and, with the LyXBlogger extension, you can upload posts direct without bothering with copy and paste.

I have never experienced conflicts using any of these methods. But, especially if using LyX, you will need to make sure that your CSS includes the right classes to make sure everything looks good.