You are coming off like this is a new occurrence. That is the way this forum has been for a long, long time. See my quote from the FAQ from 2007 stating this:
QUOTE(StrictPuppet @ Apr 30 2007, 06:31 PM)
Q: How do I see the topics that I posted in?
A: All subforum indexes have a "Show All" -> "Topics: I Replied" link in the drop down box at the bottom, there is currently not a global search for this feature.
Also if you go to "My Controls", then on the left select "View Topics". It will show all of the topics that you have posted in (after 10 days of inactivity, they are removed from this list).
Prior to that it was like that for at least 3 years, perhaps more. Not too sure why suddenly all the angst, but if a thread you replied to is that important to you, just create a bookmark for it.