aptana studio 3.0, on mac, converting \ to Yen symbol

I looked all over the place to find out both why this is happening and how to fix it. I haven't had a shred of luck.

I was merrily typing away wh开发者_JAVA技巧en my backslash characters \ came out as the japanese yen symbol. I looked through Aptana's autocomplete shenanigans and found nothing, as well as in just about every other option in their Preferences list, and their commands list, and the random buttons around the workspace I could peruse within.

Even when I copy/paste it in from elsewhere it gets converted.

I just want to do my regex.

Does anyone know how to fix this problem?