If the database is organized correctly, than changing username should only affect 1 table 
All useraccounts should have a unique UserID which can be used in the other tables like the newsposts
But like I said, I can understand if this feature is not implemented... it can get annoying if people chnage their username all the time that's why I do not have it on my forum (I can implement it though if it is needed because someone uses an unwanted (by me) username 
)
The database is a bit redundant on purpose. From time to time, we clean up our userbase. Which means that we clean the sleeping users (of which the email addresses are no longer functional). If - for instance - the newsposts were directly linked to the userbase, this would mean that all news posts submitted by these users were to be deleted, or remain with an invalid userID. We had trouble with this on the old site after deleting about 300 members. 
All suggestions were added to my personal to investigate or even to do list. Thank you for thinking along! Give me some time to make them changes
<Grauw> snout
<snout> Heya Arjan
<snout> wasup Grauw?
<Grauw> something I use very much on fora I visit infrequently is
<Grauw> "last 5 posts"
<snout> yup
<Grauw> or last 10, whichever you want
<Grauw> make such a thing
<snout> last 5 is on the frontpage
<Grauw> ah
<snout> or do you want one _IN_ the forum module ?
<Grauw> also make it in the forum section
<Grauw> well
*** Signoff: Arjan (Ping timeout: 744 seconds)
<Grauw> this one will be sufficient now
<Grauw> but it would be convenient to have one in the forum module itself too
<Grauw> on a more visible spot
*** MrBaKeR is now known as Arjan
<Grauw> and a top10 perhaps
<snout> I'm planning some huge changes in the forum module
<Grauw> ok
<Grauw> and er
<snout> (including thread/nested view!)
<Grauw> er
<Grauw> dunno if that's a good idea
<snout> but little time for developing
<snout> well, I'll do it in a way that makes sence
<Grauw> flat fora are good for the web
<snout> trust me
<Grauw> hmz ok
<Grauw> btw, increase the font size and edit box size of the post message thing
<Grauw> it's way too small now
<Grauw> also the bold doesn't help with that
<snout> hmmm...
<snout> thx for the tip
<snout> if you want me to remember them, post them http://www.msx.org/^forumtopic540.html&14 here :)
<snout> :P
Mark: nah, this is a log from #msxdev
Grauw gave some suggestions on the forum...
That's gonna be a big list!