Then last week I "upgraded" to Tab to an official version 4.0.4 via Kies. Now the USB link in the tablet seems only to recognise some types of accessory - it will see USB mass storage, but not a mouse, for instance (the mouse is there and moves the cursor OK, but my software cannot detect it.)
I have seen some posts from some time ago regarding Samsung restricting the types of USB device that the tab could use, but had my software working quite generically with no such limitations apparent.
Anyone got any ideas for a fix? failing that, any suggestions as to how to get rid of the upgrade?
Current version is Android 4.0.4
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SMP PREEMPT Fri Dec 14 11:58:41 KST 2012