Using 64-bit Linux build of v3, from tarball.
On any file, whether opened normally or even new files created with File -> New, I can use basic keyboard navigation, ctrl-z undo, ctrl-y redo and insert tabs and newlines into the documents, but I cannot make any other edits. Letters, numbers, symbols and even space bar do absolutely nothing (unless combined with "ctrl-" as a keyboard shortcut). I cannot type anything into the documents other than tab or enter.
This occurs on all three builds I've tried: 3065, 3083, and 3103. I don't have this problem with any other program on the system, just Sublime Edit.