I have exact same issue as TOLoneWolf issue#8

#8

Basically holding shift causes tool tips and name to disappear. You reported it you were fixing the issue in release 1.0.7. but unfortunately it has reared it head again.

Wawla-1.1.1_1.7.10
Waila-1.5.9_1.7.10
NotEnoughItems-1.7.10-1.0.4.79-universal
CodeChickenCore-1.7.10-1.0.4.29-universal

I noticed that TOLoneWolf noted the versions of these mods specifically so I listed mine with version.

Issue has been solved. it seems that aEther craft was at fault. it has been removed from my server and the shift issue was resolved. If you have questions i will monitor this for a little while longer, thank you for your time.

Mod was causing the disconnect: AetherCraft-1.7.10-1.5.0.82