Not sure if anyone else does this, but I typically go to my profile and then the "Find all posts by NGW" link in order to keep track of threads I have posted in and jump right to where I last was in the conversation. However, a lot of the time nowadays it doesn't show a good portion of the posts I've made recently. For example, I just posted a message, clicked on my username, went to my profile, to my posts and...it doesn't show up. The most recent post there is from..ok, so I went to go check the last post there again and this time my most recent post is there, but the last post before that is from 3:30pm yesterday, and I know I posted more in between those times.
Edit: Another example, this thread did not show up in my list.