@callmevlad - this will be welcome, I discovered it quite by accident when I pushed out a quick sign up site that relied on the internal labels and heard from a user that they didn’t know what fields where what. I don’t know how many others just bailed out before I got that feedback and added labels.
We just pushed a fix for this bug. The fix consists of including Placeholders.js conditionally for IE 6-9.
In order to apply this to your site, you should unpublish your site and re-publish it. This will make sure that the polyfill script is included in every page of the site.