Trying to fix the highly descriptive 'page build error' on an unknown page :-)

That wasn't it, put the liquid tags back into nav.html
Having now install Jekyll on a development server, I now know the issue is with the title conditional in head.html. That has now been fixed.
I have also added _site to .gitignore and changes, params.json, Gemfile & Gemfile.lock to the Jekyll excludes list
Styling changes

Converted latest post to unix format to test a theory
Added float:left to main structural elements
Added a twitter widget to the sidebar to see how that worked
Import of existing site for testing

Using exitwp exported my existing WordPress site to test out Jekyll in full
ReImport of existing site for testing

Using exitwp exported my existing WordPress site to test out Jekyll in full, this time with images :-)
Updates to site design

Changed post summary on front page from post.excerpt to post.content truncated to 55 words
Clean up

Removed the random string test posts
Added a deployment script that also commits the changes to GitHub
Import images from WordPress site manually

Manually downloaded the images from the curreny WordPress site (exitwp doesn't seem to do it right), will have to sort them into the correct folders when I start checking through the markdown formatted posts.
Styling & functionality additions

Replace flexnav with slicknav, a seemingly better script for my purposes
Added category_gen.rb, category_index.html, archive_post.html, category_index.xml to allow generation of category archive pages similar to the existing site
Added submenu capabilities to the main menu and adjusted links.yml to include some sub menus
Added new .alignleft, .aligncentre, .alignright helper classes to main.css
Remove last of the initializr styles from h5bp.css
Changed site details in _config.yml
Updated header and body styling to better match what I am looking for in future
Added new post: George's Second Year
Merge branch 'master' of github.com:richardp2/richardp2.github.io
Styling & functionality additions

Corrected the date tags in the post layout so they show up
Removed the <i> tag before <time> tags and used css to achieve the same thing
Added oembed.rb plugin for handling YouTube videos & Instagram pictures (probably not going to use Instagram oEmbeds though, they don't work how I want them to :-( )
Added soundcloud.rb plugin for handling Soundcloud clips
Cleaned up category_gen.rb category_links filter to title case categories for display
Changed category_gen.rb to only use the first word of multi word categories to create the category directory
Archive page

Built a decent archive page to match the existing one. Splits posts by year and month
General updates and theme enhancements

Added --progress to the rsync part of my deploy script
Changes post excert size to 115 words, added markdownify filter
Added post thumbnail to blog index
Removed borders from images
Added a summary.html file to display various content types differently on the front page

Next job is to clean up the existing posts and images so the site displays everything I want it to correctly :-)
Correcting Markdown in old posts

Updating the front matter, images and links to match the existing site
Post completed this time:
 * A New Start
 * A New Addition
 * Windows 8 Consumer Preview
Changed destination to the master branch in _config.yml
Updated deploy.sh to match revised workflow
Normalised line endings with .gitattributes file
Added Flickr Photoset Plugin & associated files
Functionality & styling improvements

Added (and managed to get working) Flickr Photoset & Image tag plugins for displaying images and galleries from Flickr rather than self hosting them
Updated the following posts to make use of the new Flickr plugin:
 * Instagram Digest Oct 2013
 * Instagram Digest Nov-Dec 2013
Finally fixed the menu styling so the dropdowns now show up directly below the menu item (at least in Chrome for Windows, I will have to check that out later)
Moved scripts, css & images into an 'assets' folder, will be adding other things to this once the site is fully up and running
Update the footer to match the existing site