I have been using MM for several years and have used the paid application up until recently very successfully on my iPad Mk 1 in conjunction with an external GPS receiver connected via bluetooth. It used to work great with the UK 1:250000 CAA charts for flying.
Recently however, for some reason there are 2 problems that have appeared and they are driving me nuts!
I purchased the CAA charts on CDs a couple of years ago and installed them on my PC, synched them to the iPad and all worked great. Now for some reason the current position won't lock to the centre of the screen even with a valid GPS signal with wi-fi off, or the selected CAA chart won't remain on screen with wi-fi on. The only way I can get the current position to lock is with wi-fi on and as soon as I select a CAA chart, it flashes on screen and is immediately replaced by the OS map with position lock. Trying to select a valid CAA chart repeats the process and it flashes on screen, only to be replaced by the OS map again. To get the CAA chart to remain on screen, I have to turn off wi-fi, delete the OS map, select CAA chart, but then the current position won't lock.
I'm using V5 CAA charts, XP Pro SP3 on the PC, latest iTunes (was using a year old version, so maybe that's a clue??), iPad V3.2 OS. I tried updating the MM app about a year ago, but similar map selection bugs forced me to revert to the previous version. OS3.2 won't allow me to upgrade to the latest revision of the MM app, so I am at a loss. The really annoying thing is that it all used to work great. I want to update the CAA charts to the latest version, but won't until I know everything works as intended.
Hope you can help.