Hreflang no return tags error in GWT

[Icemax]

Hello everybody,

It has been 2 month since I'm trying to figure out the cause of increasing "no return tags" error count in GWT. I have checked the syntax several times and even switched from meta tags method to including language versions in sitemap without any luck. Below is a screen shot of GWT error and a sitemap excerpt that shows original and alternate URL both having return tags pointing to each other. The full sitemap can be found here: http://wordsru.com/sitemap.xml

Any help or insight about whats going on here much appreciated. Thanks!

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