Ookkayy..
so, current status:

 - finally we got an agreement that big red square because of font loading issues and font rendering artifacts is two separate issues.
Thanks!
- i am not going to address font-loading issue here and now.. (because we spent time on it earlier today with Stef already and you should have the report on it in separate mail).

- we seem to be agreed that it is best to use same (up-to-date version) of software when reporting issues to work on them. Thanks again. :)

- while on linux and mac things seem to be working fine, i can confirm that there is rendering artifacts (same as reported by Vincent) on Windows.

so i going to explore what causing this problem..

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Best regards,
Igor Stasenko.