I found this news item today and it looks like the Ukrainian AF lost one of their Su-25's and a Mi-24:
http://www.newizv.ru/lenta/2014-06-03/2 ... radal.html
This article doesn't confirm the lof a Su-25 and Mi-24 and interestingly speculates on the use of the MiG-29's, caught by the Russians in the Krim, against the Ukranian Forces:
http://nbnews.com.ua/ru/news/123164/