I got it too. But the phone's fine now.
After I respring it shows everytime. Weird but no biggie
Hope it's not doing any damage to the screen anyway because I've seen this type of issue on old iPods that I've had with faulty screens, probably not the same thing though
+1 it is a little worrying
I've just dropped Comex and email anyway as he said people should do so if they had any problems with the JB, I will let you know if he replies
He's already aware of it and it's been classed as a very minor bug until they fix the corrupted network settings issues. It's just a shell script bug that's only visual.
Hey thanks Sheppy! Glad someone posted this thread. Its such a difficult thing to search for in engines. Wasn't to worried about the line since its just visual, but started to get a little agro trying to search this topic. Phone works good and it seems like all of us here have Jailbreaks so I guess its a common enough glitch.