In the settings console, section Appearance > Application themes > GTK Aplications, in case you want to have a darck theme, you should choose the Arc-Dark theme. If you choose the Adwaita-dark option and want to rename a file, you won't see the cursor.
I have Moksha Green, too, and because I didn't like the flat icons of the Moksha Green theme or the blue folders of the Enlightenment-X icons, I installed the Faenza icons. The GTK Applications were previously set to Adwaita-dark. Probably, the Faenza icons were causing the cursor to be almost invisible. After moving from Adwaita-dark to Arc-Dark, the cursor was back. I just posted this here to say, some combinations of dark themes, GTK applications and icons may result in an invisible cursor, when folders or files are to be renemed.
Of course there are some combinations that don't look right. There was someone who tried to use black text on black wallpaper, that obviously isn't a good combination. You may be doing something like that. If the user picks a moksha theme with a black cursor and a gtk theme with a black background, for example, is not a Bodhi problem. Not all things work together or they wouldn't be different. But each bodhi theme package includes gtk theme thats supposed to work well with the moksha theme and icons its assigned, and unless user reassigns (which unchecks the boxes), gtk theme and icons follow moksha theme.
Thunar is a new app for bodhi and there may be theme related issues with it we haven't seen yet. So if you discover issues with a bodhi theme, then its something we should probably look into.
But you need to be specific of the combination that you have a problem with, so it can be recreated, if you want someone to look into it...