**System Information**
Fedora 20 / Geforce GTX 750ti
**Blender Version**
Broken: Blender 2.74rc2 4aa5109
Worked: Blender 2.73
**Short description of error**
I am unable to move nodes around in the nodes editor the way I usually do, using the mouse.
**Exact steps for others to reproduce the error**
Trying to move nodes around in the nodes editor using a mouse (left click) seems to work once for 10 clicks. I can still select nodes, and i can sometimes drag them around, but not without numerous attempts. Using G Key works immediatly and flawlessly.
To resolve this, I opened User Preferences>Input>Node Editor>Translate and search for "translate". Keyboard was assigned, but not the mouse. There, the menu button for assigning "mouse" showed some incorrect behavior (button flashes repeteadly, and menu opens/close very fast and unexpectedly). I was finally able to select mouse for translate, and since then, everything's fine.