[eluser]Phil Sturgeon[/eluser]
The base_url is not used for asset linking, but the same logic is used in config/constants.php to create a absolute path to assets. You will need to hardcode that too. Looks like it is just missing a slash at the start.
Hopefully I can get bootcamp working again on my mac to get a WAMPserver setup, but in the meantime just hardcode the constants.php and base_url to use values you know work.