and mattsz - or anybody else - I stumbled into the same issue, but solved it. it you cannot save the map, it's because somebody before you tried to save it as a version. so if the save window has 'save as version' on it checked or something. the 'save' button is grayed out. you have to type something into the box and then save appears. i always just type 'added new member'
I thought of "typing something in the box" - but I didn't try hard enough! I typed just one letter, and the "save" button stayed grayed out, so I quit and came crying to you for help. In fact, you gotta type two or more letters to have the "save" button enabled...
Go figure!
Also, I followed your video advice about the label text, but mine looks different than yours. In fact, most of the labels are more or less unreadable on my screen - small black text with glowing red border. Mine and Desi Bike's are currently the only ones I can easily read...