I've been playing with this along with the FTB Direwolf20 1.7.

10 pack. However, I noticed there was a bit of an annoying stutter that happened at least once a minute.

At one point I got a bit fed up with it and looked at the console to check what was going on. I see it flooded with the same error over and over again:

"java.lang.NoSuchFieldException: pressed"

(See the picture)

The error seems to be traced back to this one, I removed this it, and the errors and stuttering went away.

What version of the mod? DW20 may be using an outdated version. This issue has already been fixed.

yea it is running 1.0.0b12 so it is behind.

I know why you are having issues. This was fixed a while back. The reason why this WAS happening is because the field names are different between a development environment and a running modded minecraft instance. This was fixed and you should grab the latest version. @dmodoomsirius can tell you where that is. In future version, there will be more content to this error log, so if it ever happens again, we will have more details as to why and from where.

I spoke with the modpack dev of dw20 and he is working on a update. if you want to manually update grab it off curseforge http://minecraft.curseforge.com/mc-mods/224614-notenoughkeys/files b29 @Proaxel