IE7 changes my navigation position, after the anchor is clicked

I have navigation which is positioned absolutely to it's relative parent. I've used hacks to position it correctly in IE7 and IE8. It's ok, more or less in comparison to what I have used (CSS3) for FF/Chrome and Opera. My problem is that, while the anchor is clicked in the menu, whole navigation box is moved to the left. Here's the link to the website. Link

Everything works fine in IE8, but that IE7 is driving 开发者_如何学JAVAme crazy.

Thanks in advance.

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OK the problem's solved. I changed some properties of IE7 CSS hack: position to "relative", and float to "right".