Assuming we have two installations:

JIRA: http://ttsupportvm.local:8522/jira522
Confluence: http://ttsupportvm.local:7432/connie432

Steps to reproduce:

1. Add a trusted application link between JIRA and Confluence.
2. Log into JIRA as user charlie
3. Get into JIRA, assign an issue to charlie, comment on it, etc. Let us call the issue link http://ttsupportvm.local:8522/jira522/browse/TEST-1
4. Go to the workbox notification in Confluence and click on the notification. Normally, you would expect the link to be http://ttsupportvm.local:8522/jira522/browse/TEST-1. Instead, it is http://ttsupportvm.local:7432/browse/TEST-1

This happens in Confluence 4.3.2 out of the box. But not in Confluence 4.3.3 so I suppose it has been fixed already.

I am just logging this here as a reference as I could not find anything similar.