Hi Alexey Ivanov,
I tried reproducing the problem with repeated chars in folder save name, but couldn't - I tried it on both Windows XP with IE8 and Windows7 with IE8. In both cases the path if existant is properly shown and file saved. The only time I got to see this error message was when the path was not existant on the hard drive.
As I can see you have found a workaround and you say it is only reproducable in heavy load, so please if you experience the problem again in future, please let us know to have another look at it.
the Telerik team
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