On a similar topic, but a different kind of "Pop Up"
I wanted to install the "Ultrasn0w" source on Cydia (thinking that I can use it to Unlock my 3.1.2 with 5.11.07 bb.

)
I made the common mistake of typing the address "http://repo666.ultrasn(o)w.com" with a "o" (oh) instead of a "0" (zero).
So every time I load up Cydia I get this stupid ERROR Message!
How do I tell Cydia to forget about that link and to stop trying to connect to it?
I went to "manage" to delete the specific source or whatever, turns out it doesn't exist...(and I cannot even delete the actual "repo666.ultrasn0w" source either)
I have no way of stopping this, it is getting annoying every time I run Cydia to see this pop-up.
I don't want to restore and re-jailbreak my iPhone just for this stupid pop-up, I hope there is a less drastic way to get rid of it, anyone? please... thanks in advance