I've noticed a possible problem with mining X13.  I used the password field to set my difficulty to 0.160, but occasionally all of my miners will switch to 0.010 and begin spamming the server.  It keeps doing this for quite some time, 5ish minutes or so.

I guess this could be a specific coin causing it since they all start and stop doing it at the same time.  Of course, while typing this out it happened again, but only to two of my miners, so I guess that rules that out.

As the spammy .010 messages scrolled by I noticed this message right before the difficulty downshifted: "Stratum connection to pool 0 interrupted" 

I don't think there's anything wrong with my internet connection, but I guess that could be something to look into.  I'm using Pimp on my headless rigs, and sgminer_x11x13mod_03_06_2014 on my Windows machine.

I've been sitting and watching them now, they seem to only go back to the difficulty I've set once the network difficulty changes.  I guess when a coin switch happens it goes back to normal.