Same EXACT error here when trying to change APN from Vodafone Spain to MoviStar Spain.
I read somewhere to try and e-mail the profile and install from there but same error, no joy

I sent Craig a message via the contact form on the site on August 9th but have not heard anything.
Anyone know if there are plans to fix this. I see some of you wrote it is a bug with iOS4 but the bug would actually be with the unlock it system.
Apple will certainly not be fixing it, unlockit really needs to fix it.
I was really looking forward to being able to change the APN settings on my iPhone 4 since the iPhone 4s here in Spain do not have the APN settings available in the "system preferences --> general --> network" due to the fact that the carriers wanted it that way from Apple so even if we unlock the phone we can only use the data services with the original carrier. They also have us by the shorthairs if we travel abroad since while we can get a local SIM for voice, if we want to use any data reliant service on the iPhone 4 then we can only do so with the original carrier SIM and at extortion data roaming rates.
Sly dogs!!!
hope unlockit is even slyer

))
Am very willing to donate some cashola via PayPal if it works on the iPhone 4 but it does not.
Saludos,
jez...