IRI runs fine ages now, but I just got an error trying to run the GUI. First time/version this has ever happened, btw.
Fresh install, old db deleted, updated java, node.js, etc. Please let me know what I am missing:
A JavaScript error occurred in the main process
Uncaught Exception:
Error: /tmp/.org.chromium.Chromium.GP4ELP: invalid ELF header
at Error (native)
at process.module.(anonymous function) [as dlopen] (ELECTRON_ASAR.js:173:20)
at Object.Module._extensions..node (module.js:583:18)
at Object.module.(anonymous function) [as .node] (ELECTRON_ASAR.js:187:18)
at Module.load (module.js:473:32)
at tryModuleLoad (module.js:432:12)
at Function.Module._load (module.js:424:3)
at Module.require (module.js:483:17)
at require (internal/module.js:20:19)
at bindings (/opt/IOTA Wallet/resources/app.asar/node_modules/bindings/bindings.js:76:44)

Edit: Ubuntu 16.10 64-bit
Try restarting, that often solves the problem.
Otherwise you can also wait for the next pre-release or for the official release. The current light-wallet is still in testing / development and has some bugs.