One day I logged in to server, and discovered that none of mana spreaders are working. It was fine before, I had a lot of things working. Now, bursts don't shoot. It displays direction (little "shadow" bursts while holding wand) but no bursts. And no, I'm not out of mana. I placed phantom focuses on them, I tried elven spreaders also. It was on r1.3-131

After I updated to r1.3-143 things became stranger. Now it is completely random, burst may shoot through, may not reach or overreach destination, or may not work at all. Sometimes, bursts appears 10-20 blocks from spreader and fly to infinity. May be there is a way to reset all the system? I don't see many people with this problem, so it is probably my world specific.

I'm using FTB Direwolf20 1.7.x modpack version 1.0.3
My FML-log is too big for pastebin, so I uploaded it to dropbox:
https://www.dropbox.com/s/wdorqsm2nqw337g/fml-client-1.log?dl=0

Also, I uploaded video to youtube that demonstrates this bug:
http://youtu.be/CjEH5_DWXQE

I tried to update Botania to 145, but it is completely same as in 143. I thought it may someway connected with void age, so I tried it in overworld.

Do you have blood magic armor with whirlwind? That's known to break it.

Try removing it.

No, I don't. I have TTKami armour.

That helps! So it is somehow related to projectile protection that these two armors give? After removing and placing back all spreaders things are working now. But I can't wear my awesome armor. Is it a problem on Thaumic Tinkerer side?

I think they've fixed it already, try updating. But yes, the bursts are counted as projectiles so the armor deflects them.