When you place either a slab or a stair on a block, sometimes the server puts it in an incorrect placement. For instance, if you place it in upside down by clicking the upper side of a block, but almost at the bottom, the client will show it correctly for a second then the server will correct the client. I know this is a bug because it is possible to place an upside down half-slab on the side of a right side up half slab.
I have not reproduced in 1.4.4 yet.
Linked issues
Comments 11
I've experienced the same intermittently. It'd be helpful to isolate when this occurs. (My hunch is it is related to some type of physics update check that occurs after block placement where some routine incorrectly resets the block orientation to default.)
I dont know if you remember. but back in the days, when you shot an arrow, it warped up a block, i think somehow the same is happinig here.
Check if you are crouching when it happens. In the mod redpower there are small blocks that are placed differently where you place it on the block. But if you crouch the preview shows correctly but it places where your crosshair would be if yoy weren't crouching.
Ezekiel
I have experienced the same thing. it is so annoying when building