I have seen seen this too, downgrading with image ap3g2-k9w7-tar.153-3.JBB6 fixed it for me. As you say it only affected GUI access.

I don't think its is a problem with the image, there must be a bug in  8.3.102 which is effecting the 2800 & 3800 APs. If you have a WLC running 8.2.121 you should be able to get the 3802 to join this which will upgrade the image on the 3802. Once yo...

Hi, You need to convert the AP to Mobility Express. This guide has all the details: http://www.cisco.com/c/en/us/td/docs/wireless/access_point/mob_exp/82/user_guide/b_ME_User_Guide_82.html

Hi Adir, I have had this problem with an AP2800, the only solution I found seems to be to convert the AP to a CAP running the 8.2.121 image then then convert back to 8.3 Mobility Express. I couldn't even get it to join a WLC running 8.3.102. The AP2...

It could be this bug CSCuy27190 but not sure why the AIR-PWRINJ4 doesn't fix it.