http://www.botanicalgarden.ubc.ca/forums/attachment.php?attachmentid=71507&stc=1&d=1255631034 http://www.botanicalgarden.ubc.ca/forums/attachment.php?attachmentid=71508&stc=1&d=1255631034
Pretty sure 1. is Yucca elephantipes (guatemalensis) in desperate need of more sun. Plus that's a common occurrence indoors. http://www.gardenbuddies.com/forums/indoor-plants/3503-yucca-plant.html