what is 1.5_01
they dont say
Bug Fixes:
Game no longer crashes when Detector Rails are placed.
Blocks can now be placed on Snow / Water.
Rain no longer goes through translucent blocks.
New Bugs:
Using tools in SMP will crash the game with "internal server error" on some servers!
Attacking anything with tools in SMP will crash the game with "internal server error" on some servers.
If you resize the window (no-fullscreen) after typing in the world name and the seed, they both will be reseted to "New World" and a blank seed.
In SMP you will get an "dirt screen" when taking something out of the Workbench.
When a snow block is destroyed on a leaf block, either by having a block placed on it, or being mined with anything, all connected snow and minecart tracks are destroyed that are level with it. The minecart tracks drop resources normally, but the snow will only drop one snowball per area if mined with a shovel.