Problem Definition
Log files are stored and transferred uncompressed. This becomes an issue when trying to download some Build Logs which reach multiple hundreds of Megabytes.
Suggested Solution
When clicking the 'download' link for a build log, compress the log server side, then send to the local web browser as a .zip file.
Workaround
SSH to remote agent server, and compress the build logs manually, then SCP them to the local machine.