Welcome

Your Kdenlive version was upgraded to version 0.7.6.
Please take some time to review the basic settings.

Fatal Error

Error starting MLT's command line player (melt).
MLT's SDL module not found. Please check your MLT install.
Kdenlive will not work untill this issue is fixed.

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any help, please? I use Fedora 11

Did you also install MLT as described for your platform?

Please, read this post:

http://www.kdenlive.org/forum/kdenlive-not-starting-after-installation#comment-5166

You simply must delete kdenlive's config file and run kdenlive again.

"You simply must delete kdenlive's config file and run kdenlive again."

Which one - located where?