Now that i've got your attention, can i ask some questions about my lifts?

From today's workout:
Bench: 57kg
http://www.youtube.com/watch?v=da20nQEkeJc

Is the form ok? Am hitting too low on my chest? and should my bar path be like vertical? I see like a little loop at the bottom where the bar gets further away from me. Is that right?

And deadlifts: 112.5kg
http://www.youtube.com/watch?v=CB1FdoeLeDE

Once again i see the lower back rounding but i seriously don't know how to fix it. It seems like my natural setup position is already quite parallel to the ground making it easy for me to become more rounded. But if i try to lower my hips before the lift, it makes me in a crappier position to begin the lift and i often end up returning to the original position after that rep. Would it be because i'm standing on a board so that i'm slightly higher up than i should be? Back at the uni gym i would use the deadlift platform that had bumper plates which had a greater diameter so the bar could sit higher up. Do i need to somehow artifically raise the plates by maybe putting some boards under them?

Thanks again guys.