<h1>Bug?</H1>
For me, it is a bug
<h1>Test</h1>
For a test, one may se the C-Code in (well, it is C gravejard, but the same stuff exists in C)

It does the oposite of the patch, send two surrogates one after the other. This may also be done using two send/postMessage commands.

I don't know how other Tk tests work and if the sendkey command is used there.
Those might be extended or used.

Apparently this is only an issue on 32 bit issue. On 64 bit, one may send the unicode by one message.

Just my 2 pennies,
Harald