Chrome has whitelisted bitcoin: URIs for web apps, and Firefox it turns out doesn't use whitelisting at all, so it already works there.

https://chromiumcodereview.appspot.com/14531004

I'm hoping this means web wallet developers won't be put off from supporting the payment protocol (that risk is the reason I started this work).

The next step is to file bugs against WebKit (for Safari/iOS/misc other platforms), and IE, though I don't know if Microsoft uses open bug trackers much.

On Wed, Apr 24, 2013 at 6:37 PM, Gregory Maxwell <gmaxwell@gmail.com> wrote:

On Wed, Apr 24, 2013 at 7:51 AM, Gavin Andresen <gavinandresen@gmail.com> wrote:
>> Ian pointed out some errors in the BIP21 spec. What's the process for
>> amending the BIP? Do we need to create a new one and mark the old one as
>> replaced, or can we just fix it in place given the relatively exotic nature
>> of most of the issues?
> Those all sound like bugs in the BIP; I think they should just be fixed, I
> don't think we need a new BIP.

Yup. Corrections are fine, esp ones which are not gratuitously incompatible.