Problem here is old webkit browser, I've patched the next release to be compatible with these old versions.
You can manually apply this patch now, by uploading these CSS files to your website.
peafowl.css - lib/Peafowl/
style.css - app/themes/Peafowl/
Once you change those, you will need to flush your browser cache to reflect the changes. Maybe you will need to flush your CDN (if apply).