olmec valley last of three blocks

I'm in level 10 (olmec valley) and I try to push the last block out of the room that was full of water on to the pressure plate. But it isn't moving. I now it is possible, 'cause I did it before. Now I can't possition the block correctly in front of the opening. Is this a bug?
I'm stuck here for a few days now and it is starting to get irritating.

I had the same problem. I had to replay the level and then it worked. It must be just a bug. Have you downloaded and applied the patch?

Well, I replayed the level and this time I could push the block in the hole. Now I'm at the pyramids.