Do you write your blog posts using Vim? If you use Markdown, you might have noticed syntax highlighting is a bit off. I was wondering why that might be, when I found this very helpful thread on Stack Overflow.

Long story short: many of us use .md as our Markdown extension, but Vim is recognizing that as a Modula file. This is very easily fixed by adding the following line to your ~/.vimrc file:

au BufNewFile,BufFilePre,BufRead *.md set filetype=markdown

And that's it.