Token suddenly case sensitive

I'll be honest that I dont have alot to go on here....I'm seeing some weird things I can't explain and am looking for some input:

My setup:

• I have a production server (Blackmesh) and a dev server (MAMP).
• I sync all files/database from prod->dev using git and an sql sync (drush) so I know I have identical configs on both
• I'm inserting views into nodes using Views insert.
• Views that have no arguments work fine.
• Views WITH arguments just recently stopped working on production...but STILL WORK on dev (?!)
• Up until very recently Ive had no problems with insert view on production...everything worked as expected
• On production, I've tried both manually typing the argument into the insert token. No luck.
• On production I've tried 'using a default argument' from the 'node id in the url'. No luck
• Both of the above work fine on Dev.
• I've tested the View using the 'views preview' by manually putting in the argument on the production View. It works fine in Views preview, which tells me it's a views insert issue (not an issue with the view itself)

So I'm at a loss. What, in the server configuration (which is the only difference I can think of) would cause this behavior?