Unable to save stories at all

[Jessa]

Every time I try to save I get a notice that the file type has invalid characters. It doesn't matter what the story is called, and there are no hyphens or anything but letters and spaces in the titles. I even tried to take out the spaces between words, and that won't work either. I can get through the download stage but not actually save anything to my computer.

[Chad Peterson]

What OS are you using?

Thanks,
Chad