I seem to get a "ScriptGetGlyphABCWidth failed." error quite often. I have the latest version downloaded (1.6). Sometimes it runs fine, but sometimes it starts popping that error up and will not stop till I shut down EW and restart.

Any ideas what this is?

Was a specific font being used? Even with the myriad of errors I've seen testing EW6 I've not run across that one.