php messing up link

I'm trying to create a link as follows:

<a href="http://www.facebook.com/sharer.php?u=<?= $linkAddress ?>&t<?= $message ?>">

however, when I click the link, it takes me to the correct URL, but preceeded with:

http://pal.sandbox.dev.co.uk/go/music/artists/profile/show/ext/_auto/-/

which is (close to) the address of the page I've just come from. Anyone have any ideas why this might be happening?

to clarify:

the html generated is:

<a href="http://www.facebook.com/sharer.php?u=http%3A%2F%2Fwww.bbc.co.uk%2Fprogrammes%2Fp001d7pg&t=My+music+was+broadcast">

but clicking this link takes the user to the address:

http://pal.sandbox.dev.开发者_运维知识库co.uk/go/music/artists/profile/show/ext/_auto/-/http://www.facebook.com/sharer.php?u=http%3A%2F%2Fwww.abc.co.uk%2Fprogrammes%2Fp001d7pg&t=My+music+was+broadcast

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<a href="http://www.facebook.com/sharer.php?u=<?= $linkAddress ?>&t=<?= $message ?>">
missing the = after t

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I've worked out that this is caused by javascript not php (disabling javascript fixes the problem). I haven't written any of this site's javascript, unfortunately, so will have to trawl through it looking for bugs..

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I'm sure you've worked this out by now but this is something called go tracking. It's an internal BBC thing so come and ask in #frameworks in IRC if you need help.