HTMLCellFix.m

// Fix table-cells
NSArray *cells = [document nodesMatchingSelector:@"td"];
for (HTMLElement *cell in cells) {
    NSString *align = [[cell attributes] objectForKey:@"align"];
    
    // Replace center aligned cells with a centered span
    if ( align && [align isEqualToString:@"center"] ) {
        NSString *newContent = [[cell serializedFragment] stringByReplacingOccurrencesOfString:[cell innerHTML] withString:[NSString stringWithFormat:@"<span style=\"text-align:center\">%@</span>", [cell innerHTML]]];
        htmlString = [htmlString stringByReplacingOccurrencesOfString:[cell serializedFragment] withString:newContent];
    }
}