Quicktime x cannot open mkv file with perian installed

I just installed Lion and found out that the quicktime x is not so good as it is in Snowleopard that even though I install the latest perian, I cannot play the mkv file via Quicktime X now. Does anyone have any solution?Thanks a lot.

Install QuickTime Player version 7.6.6 and use it instead of X.
http://support.apple.com/kb/DL923

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Quicktime x cannot open mkv file with perian installed

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