It's not all bookmarks are having issues; I will save a bookmark, verify it, look at it later and it's still correct, look even later and it has been changed to some ad link or something. Example: http://googleads.g.doubleclick.net/pagead/ads?client=ca-pub-0077202605626466&output=html&h=600&slotname=4153090285&w=160&lmt=1306034690&flash=10.0.12&url=http%3A%2F%2Fwww.rumormillnews.com%2Fcgi-bin%2Fforum.cgi%3Fread%3D205062&dt=1306034691292&bpp=3&shv=r20110512&jsv=r20110506&prev_slotnames=3401334257%2C9653369832&correlator=1306034691054&frm=0&adk=3256405821&ga_vid=632295826.1271634483&ga_sid=1306034691&ga_hid=529914415&ga_fc=1&u_tz=-240&u_his=1&u_java=0&u_h=1024&u_w=1280&u_ah=994&u_aw=1280&u_cd=24&u_nplug=21&u_nmime=79&biw=1261&bih=826&ref=http%3A%2F%2Fwww.rumormillnews.com%2F&fu=0&ifi=3&dtd=154&xpc=lHw4GJaXKF&p=http%3A//www.rumormillnews.com This only happens with particular sites; I use the same version of Firefox on another computer and can save the same bookmarks with no issues. I hate to be paranoid, but the only sites affected are ones that present information about the evil people in power. I have to save the bookmarks in a text file and re-paste when I want to visit them. This is really starting to piss me off. I don't think it's Firefox, but some kind of virus. I have full virus protection and regularly do deep scans to no effect (for this issue). If anyone has any ideas, I'd like to hear them. Thanks!