after jailbreak i start install back my cydia apps as usual, but suddenly it crash and restart. after that, yahoo.....
my screen become tiny on left top corner. now i hang there, i think the only solution is restore and re jailbreak. hahahah.....

All iphone, ipad and ipod user install cydia at the same time how do u expect cydia server to handle? remember ios 5.0, even the apple activate server also cant handle. wait for tomorrow, should be ok.