there is no solid way to fix it every time. Tho I here IntelliscreeX rispring in NC fixes it very well. The best way I got them fixed is "SpringBuild" from a repo in Cydia and the "Respring" app from Cydia. Those two apps seemed to be most affective, since I sm not a huge fan of "IntelliscreenX". But even that won't work often sometimes. Do even tho it does not work 200% every time i still highly reccomend launching "SpringBuild" let it crash, wait 3 seconds, open "Respring" app and your I white/blank icons will be fixed at least 90% percent of the time. So this is "the" best method out there I found, aside from "IntelliscreenX" which btw did a great job fixing the white icons during my trial use on my iPod Touch 4G on iOS 5. So I would stil use them. Unless u are an avid "IntelliscreenX" user. I think it's a cool tweak n all. But so not worth $10. So many tweaks out there that do so much more than IX and are free or are at least 1/3 the the price of.......... So. Yeah?For me, I seem to get more white icons and they're more persistent for a while any time after I install an app, both from cydia and the app store. But other than that it seems totally random, I don't even have or use winterboard.