I have an existing WP install that I'm attempting to convert into a multi-site, in order to set up a development version in a subdirectory (required for testing an SSL on the same domain).
I've been able to do the initial stages of the multi-site okay, but when I've inspected my directory for the blogs.dir directory, I found that instead of a folder, there's a text file there.
Here's a screenshot: http://screencast.com/t/jlV4JAaUUmV
I can't find any examples of this happening online, nor am I sure how the install works okay without a folder there.
All parts of the original site run fine, but because the blogs.dir is a text file, I can't import files for my development installation...
Is there a step that I missed?