I found a thread from 2008 that discussed this issue, however, it does not appear that the thread really resolved the issue I seem to be having. Each time I re-spring I get about 9 blank icons. I can delete them but they come right back after I re-spring. I've looked within Cydia to find out if I have anything that suggests blank icons are installed as a suggestion in another thread but I'm unable to locate why this is occurring suddenly. It only began after I installed HTC Clock Springboard (I thought to be the culprit), which I have uninstalled to resolve the issue with no success.