Ok, this problem occured after I upgraded to Wordpress v1.5.2. Since I also installed several new plugins after the upgrade, I’m still not 100% sure whether this problem come from Wordpress or from one of the new plugin that I’ve just installed.

I’m talking about permalink trackback. Normally, before I upgraded into v1.5.2, when I put trackback, the permalink is correct. For example:
http://www.funponsel.com/blog/archives/2005/08/11/helena/
But now, the permalink doesn’t work anymore on the trackback.
http://www.funponsel.com/blog/?p=411

You can see them here. The first trackback is made on August 11th, while the 2nd is today (August 21st). I upgrade to Wordpress v1.5.2 on August 16th. Also, the 2nd trackback is completely wrong. From this post, I’ve never put a trackback to that page (My Chemical Romance – Demolition Man lyric). The ones that I trackbacked are below (quoted from my post):

… popular post: Helena (#1), You Know What They Do To Guys Like Us In Prison (#3), and Under Pressure (#4). …

Can anyone confirm me whether this problem came from Wordpress engine or not? Tomorrow I’ll try to deactivate all my plugins and post some trackback again to see what happen. But if anyone can help me before that, I’d really appreciate it )

Updated:
Ok, I’m confused now The permalink trackback is now correct for this post. Oh well, I’ll check the trackback result again when I post later.

Updated:
Sorry for silly mistake here. I wrote v1.5.3, the correct one is v1.5.2. Wordpress v1.5.3 is not out yet :p
Thanks Andry!