Vimeo videos now showing black lines

Hi BlueOwl,

I haven’t changed anything (apart from updating to WP3.6) and now all our Vimeo vídeos show 2 black lines on Safari (left-right) and 1 black line on Chrome (top) as if there is a problem with the aspect ratio. It ruins the integration since many of our videos use white backgrounds. Take a look here: http://www.vocesenlared.com/blog/
The videos keep their dimensions on Vimeo (1280×720), we are still on Aqua 1.7 and the code remains the same:

Any ideas?

Regards,

Javier