I have an class method which generates an UIView, like this:

+ (UIImage*)imageWithFileName:(NSString*)imgFile {
    UIImage *img = nil;

    NSBundle *appBundle = [NSBundle mainBundle];
    NSString *resourcePath = [appBundle pathForResource:imgFile ofType:nil];

    if (resourcePath != nil) {
        NSURL *imageURL = [NSURL fileURLWithPath:resourcePath];
        NSData *data = [[NSData alloc] initWithContentsOfURL:imageURL];

        img = [UIImage imageWithData:data]; // should be autoreleased!!

        [data release];
    }

    return img;
}

However, when I use this, the image data is NEVER freed. There is definitely a memory bug with this, although I didn't break any memory management rule I am aware of. My guess is that because this is a class method which gets called from instance methods, There is no active autorelease pool in place or it's one that only gets drained when I quit the app. Could that be right?