Not sure if this has been posted already, but the zoom box that appears when you hold down 'Z' can only move left, right or down with the cursor but not up (you have to release the Z button and move the cursor to the correct location before pressing it again). This is getting somewhat annoying when editing minor details.
Fire and Smoke passes through all filter walls. And other Gasses through gas and powder. That was already posted but it shall be fixed?
And Pipe Removes Color but Portal not.
If u type in: !set temp yest 317 then the yeast doesnt grow till it touches another thing (even yeast with another temperature) that shall even be fixed.