Hello First of all: KDEnlive 0.7 is the best Videocutter I have seen on Linux so far. I had it working as a Debianpackage and had a little Video for a song of mine within 2h and the stuff was cut out of crude 3gp-clips from a Nokia-mobile, mixed with other even more crude AVI-clips of unknown origin... But it crashed on me often and broke my packagemanagement so I decided to try the step by step compiling instructions one more time. After activating the backports and doing apt-get upgrade it compiled without errors and now: Under XFCE: It starts to the point saying something like scanning effects, then it stops. No windows, no messages... Under KDE4.1.3: It opens the "You start for the first time" dialogue then it crashes with: X Error: BadWindow (invalid Window parameter) 3 Major opcode: 2 (X_ChangeWindowAttributes) Resource id: 0x2800288 KCrash: Application 'kdenlive' crashing... sock_file=/home/zettberlin/.kde/socket-ubustu/kdeinit4__0 What can I do?