Hey Wally.
I'm having trouble making the pagination work postbackaction
right now it generates links of this form
http://localhost/vanilla/extension.php?page=2&PostBackAction=Blog
which works fine, but its wrong. the postbackaction needs to be before the &page=2. It also not working with friendlyurls either.
the code is the same as from Discussion grid
$CategoryID = ForceIncomingInt('CategoryID', 0);
if ($CategoryID == 0) $CategoryID = '';
$pl = $this->Context->ObjectFactory->NewContextObject($this->Context, 'PageList', 'CategoryID', $CategoryID);
$pl->NextText = $this->Context->GetDefinition('Next');
$pl->PreviousText = $this->Context->GetDefinition('Previous');
$pl->CssClass = 'PageList';
$pl->TotalRecords = $this->DiscussionDataCount;
$pl->CurrentPage = $this->CurrentPage;
$pl->RecordsPerPage = $this->Context->Configuration['BLOG_PER_PAGE'];
$pl->PagesToDisplay = 10;
$pl->PageParameterName = 'page';
$pl->DefineProperties();
$PageDetails = $pl->GetPageDetails($this->Context);
$PageList = $pl->GetNumericList();

Its part of the blog extension
u can download it from here, if u want give it a try
http://lussumo.com/community/?CommentID=66933

thanks in advance :)