iPhone and SharePoint Alerts Through Hosted Exchange

I love my iPhone.  I mean I *really* love my iPhone.  I’ve had it for about a month and a half now, and it is truly an amazing piece of technology and extremely well done.  As most of us who are fundamentally Microsoft folks say, “Microsoft take note”!

However, here’s a little bugaboo with SharePoint that I can reliably reproduce.  I’ve set myself an alert on a SharePoint Document Library on a WSS site.  When I receive one of these alerts on my iPhone through my hosted Exchange account, it comes through fine.  However, from that point forward, the pipe is clogged: no more email messages come through until I delete the alert from my iPhone.  This makes little to no sense, as the contents of an email ought not to make a whit of difference, but I can reproduce it at will.  I haven’t been able to figure out exactly where in the chain that the problem is, but I’m fairly certain that it is in the interaction between the iPhone and hosted Exchange.

Anyone else seen this?

UPDATE 2009-07-31: It occurred to me today that this hasn’t happened in a while.  Maybe the 3.0 OS upgrade fixed it, but I can’t say for sure.