Help installation error

[frankiepapa]

i received an error downloading an app from the market...the new daily news app...the exact message is "installation error unknown reason-18"..has anyone seen this before?

 

[Raekwon]

I've got that error trying to install a couple apps and noone on this forum seems to know anything about it. I am not rooted and have deleted any caches I can find. I have no apps on my sd card.

 

[wacko11]

This happened to me to.........u have to unmount ur SD card in order to download the app........I hope someone finds out the reason y its happening.