Filename Invalid : WONT PUBLISH

I keep getting Filename Invalid . Screenshot:

I've tried everything! ie) deleting trace of this image, changing the name, reinstalling rapidweaver, restarting my mac, repairing disks, clearing cache, deleting photoalbum and retrying, changing file type, and so many other things. And I STILL get this error and cannot publish. PLEASE HELP. My website is www.xceptionmedia.com. I dont know what else I could possibly do, I am running on rapidweaver 4.3 and have read and tried following all similar forums about this problem. I'm really starting to hate rapidweaver with all these bugs.