After a bit of digging the issue ended up being that:

<a href=”http://seekingalpha.com”>SA</a>

displayed like this (which is desired on the unit):

SA <http://seekingalpha.com>

While this:

<a href=’http://seekingalpha.com’>SA</a>

displayed:

SA

Not sure if ignoring links with single quotes is something on all Blackberries – just this unit – or even the way this particular unit is configured… but at least it’s not hard to fix once identified!