textbox previews/publishes with magenta background when no fill is set

Hi there,

I'm trying to republish a module I've developed and for some reason Articulate Presenter '13 has decided to put magenta backgrounds on everything. The course previously published without issue. 

• I updated to the most recent release to see if that resolved the problem with no luck. 
• As it's an older module, I updated from .ppt to .pptx and still no luck. 
• I've tried to delete animations and re-add them; no luck.
• I've tried deleting the text box and adding it again, still previews and publishes as magenta
• I've tried filling the textbox with white, set to completely transparent, and it still previews/publishes as magenta.
• I don't even have magenta in my theme's colours anywhere.

Any suggestions would be greatly appreciated as my 30 minute republish has now turned into 3 hr + with no end in sight. 

Thanks!