Despite no code changes, certain SauceLabs tests are failing - Opera 11 on windows, chrome on linux - and Firefox 3.6 can't be found anymore?

Hit Ctrl+F and search "fail" to see the details
https://travis-ci.org/imazen/slimmage/builds/89684769

We need to fix 'unstable' (and thereby 'master') so that PRs can be tested. Both are identical, but unstable's tests have run recently and 'master's have not for 8 months.