The latest Shareholder Club slot cards from Jim Kelley's Nugget in Lake Tahoe are now more green in color and the back text is slightly changed. The text is moved up closer to the mag stripe and the font is slightly smaller. On previous cards the text was approx. 10-12mm below the mag stripe while it's now approx. 5-7mm below the mag stripe. The changes are very noticeable when you hold the cards together.
Here's a scan of the back of the previous cards for comparison...