"Invalid Technic Platform Delivery URL" on linux

[rakslice]

Launcher Version: 392

Operating System: Linux Ubuntu 12.04 on x86_64

Java Version: OpenJDK 1.7.0_25 64-bit

Antivirus Program: N/A

Description of Problem:

I'm trying to use the pack at http://www.technicpack.net/apiv2/modpack/moonquest-yogscast-inspired but I get the "Invalid Technic Platform Delivery URL" message in the URL dialog. The same URL works fine on a Windows box, and accessing that URL in a browser on the Linux box gives the usual JSON, so it's not a network problem.

Error Messages:

Invalid Technic Platform Delivery URL

Error Log:

There's nothing in this folder, probably since I didn't get as far as launching.

[rakslice]

nm, looks like an invalid link on the dev site