Strange. Try refreshing the frame?
What I do experience is that if I enter the forum directly from
www.abandonia.com/vbullet/ it won't remember me from my cookies, but if I enter in
www.abandonia.com/forum/ which has the forum inside a frame, it will every time. At least used to happen so I now enter through /forum/ every time. I use Opera but I don't know if this depends on the browser.
I do have a strange problem with cookies at another site, I wonder how standarized cookies are compared to HTML and CSS, maybe other browsers have small differences in cookie handling compared to IE and Netscape/Firefox. At least I know that Opera stores all cookies from all sites in one single file instead of separate ones.