Track effects have a problem...

Hi All, in kdenlive there is a powerful feature: track effects.
But, this feature have a big problem!

When i apply an effect on three tracks kdenlive closed.

For example: if i apply the "letterBoxed" filter on the first and the second track, when
i apply on third KDE crash!


Have a look at this bug report:

Will be fixed in 0.7.9

Thanks for information