Charging is not supported with this accesssory.
Oh. Ah. Inconvenient, in that I am always charging while using accessories. But I guess I can live with that. I did get a little nervous a few hours later I saw the message come up when I wasn't charging anything at all. And that was when I did what any decent researcher does: I went to Google. I typed it the phrase (above) and I put it in quotes. WHAM: 81,800 hits--not a lot, you will say, for a Google search, except recall that this is a seven-word phrase in quotes. Evidently, it seems that I am not alone. And that this happens a lot.
To make life manageable, I cut myself down to the last month (405 hits) and started reading. And I certainly got advice. O boy, did I get advice. Here's stuff from a three-page comment thread, starting last spring and updated as recently as last week:
"If its a third party USB cable it may tell you that message. If its the Apple cable, try resetting you iPhone, if that fails a restore may need to be done" ... "Cleaned connectors as suggested, no dice. Changed sockets on USB hub still no dice. I then plugged the cable into the wall socket charger and no warning sign and iPhone 3GS." .. "I already tried system upgrade, resetting it, and even forced restart."
You get the drift. Actually I thought I had the problem solved for a while yesterday but it started popping up again last and I've changed plugs so far three times while writing thisApple i am sick of yoyr company ignoring this major issue and conflicts with your phones.i have tried many different remedies to get my phone to charge properly i have restored my device even purchased 3 cords n 3 chargers the issue stops for a inane amount of time and starts back up again. This message is driving me nuts is there any thing you can give your customers to stop this issue software update maybe??
[Feel better? Yes, thanks, a little. But the charger still isn't working.]