Help, my spider farm ain't working

oceanclub

I've built a spider farm as shown in "Cave Spider XP Farm For 1.2 Tutorial":

http://www.youtube.com/watch?feature=player_detailpage&v=edswdi7JpuU#t=594s

Am pretty sure I've built it exactly right. However, the spiders generate but simply don't come out of the first hole:

http://img11.imageshack.us/img11/7505/spiderss.png

http://img834.imageshack.us/img834/8836/spiders2j.png

Here it is in cutaway - I've removed two glass blocks from the roof of the channel and climbed in:



As you can see, the spider doesn't get washed into the channel. The channel is 1 x 1 wide, as per the video. The water blocks seem correct and so does the channel. Any help appreciated. I'm wondering has a change between 1.2 and 1.4.4. caused this.

P.

Solitaire

The video lies

Spiders are wide critters and need a 2Wx1H channel, not 1x2 like the more humanoid mobs

oceanclub

Solitaire wrote: »

The video lies

Spiders are wide critters and need a 2Wx1H channel, not 1x2 like the more humanoid mobs

Oh bummer. Looking it up, I think I built a cave spider trap - which are smaller than 1 block - using a normal spider monster spawner. ARGH.

P.