Little Scanning Help Here, Please!

[Tsaiko]

I've scanned a lot of cards in the past and have gotten pretty good results. If you've seen any of the scans I've posted they are the right size without any scroll bars or wasted space. Now all of a sudden, I'm getting inconsistant results, with most results getting the extra space and scroll bars. I haven't changed the settings on my scanner and can't figure out what I'm doing wrong. If anyone could offer some advice what to try to go back to getting simple scans, I'd appreciate it. It's really not that important, since these are all my paper loss commons, but eventually I'll want to post scans on ebay for some of these.

I'm using an all in one HP Photosmart 2570 series printer/scanner, if that helps at all.

Thanks for any help.

Sample of what I'm talking about, below. I don't really want to take the time to go back and crop all these scans...there's got to be a better way.