Safari "tel:" phone number links stripping non-numeric characters

After a week of owning my iPhone (two weeks after it launched) I made myself a little web interface that contain various iPhone-helpful links. Four of these were AT&T specific telephone links:
*646# - check how many minutes remaining
*729 - pay your bill
etc etc..
(e.g. <a href="tel:*729">click here to pay your bill</a>)
Well, needless to say this was a very convenient feature, however these links no longer function properly. It seems that the iPhone is now stripping any/all non-numeric characters from the link (although I haven't done extensive testing to see exactly which characters .. only with * and $ in particular).
I've even tried HTML entities but they were stripped too.
Now I know apple had a security fix a few patches back, one that fixed a vulnerability involving "tel:" links (CVE-2007-3755), but I haven't found any documentation regarding special characters now being ignored/stripped.
So, my question is does anyone know if there is a workaround for this, or did the patch inadvertently and permanently destroy the ability to send these very helpful text messages via a web interface?
Thanks,
Marc

I'm having a similarly annoying behavior with "tel:" links. I'm doing the same thing -- writing a web page to store some convenient numbers, but for me, it's for teleconference numbers. You dial into a toll-free number, then after a pause, dial in a passcode.
On the iPhone's contact list, you can program in the pauses as the letter "p."
However, in a tel: link, the p's change to 7's. Interesting!
What I've discovered is that, for me (FW 1.1.2), alphabetical characters are translated into their numerical equivalents. So 1-800-COMCAST (a number I've had to dial all too much recently) gets rendered to 18002662278.
This is a difference between Safari 3 and the iPhone version. On Safari 3 on the Mac, both the HTML and a mouseover shows that the tel link contains the letters. On the iPhone, though, clicking the link brings up a dialog box with the letters "translated."
So, interesting -- but now I have a problem. How do I enter a pause into a tel link?

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Safari "tel:" phone number links stripping non-numeric characters

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