im having exactly the same problem, aneboda frame, lillaker slats, and at the slightest movement the middle ones on the right side collapse. I was so excited to have finally bought a frame and slats after having slept on a mattress on the floor for 2 months, now I have to disassemble everything and bring it all back, how frustrating. Ive only had good experiences with Ikea in the past, this experience has made me think twice about Ikea products. :-(
