Cisco Wireless :: AP 1131 Upgrading To LWAP

We're in the process of upgrading our Wireless AP's from autonomus to LWAP. We're doing the upgrades remotely (we have 100's of sites to do, and it's not possible to be there to console on to each one), using a local computer to upgrade them to LWAP's with the Cisco Upgrade Tool.Having some inconsistent bugs pop up though from time to time.The most common one is that it basically buggers up the IP address after applying the recovery firmware image. It's supposed to keep the IP it had according to the IPFile.txt (for example 172.25.25.4), but it does something very weird... it keeps the last two octets (so 25.4 from the e.g) but replaces the first two octets with a 192.168 address. So the final address in this example after the UpgradeTool has done its work, is 192.168.25.4 - which is compeltely wrong.
 
This causes it to be unable to talk to the WLC (obviously, with bogus IP information it will struggle), and gives us big problems in that it wont ever come up unless someone can console to the AP and fix it. We can usually resolve the issue by munging about on the switch - switching the port it's connected to between access and trunk and doing some shut/noshut cycles seems to do the trick mostly.