Getting following error - Handler for (null) returned invalid result code 70007, referer:

For some reason my server is showing the following errors…


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[Wed Sep 14 23:16:04 2011] [error] [client xx.xxx.xx.191] Handler for (null) returned invalid result code 70007, referer: http://www.xxxdonotclickxxxx.com/mah-jong.html<br />
[Wed Sep 14 23:16:16 2011] [error] [client xx.xxx.xx.191] Handler for (null) returned invalid result code 70007, referer: http://www.xxxdonotclickxxxx.com/mah-jong.html<br />
[Wed Sep 14 23:16:29 2011] [error] [client xx.xxx.xx.191] Handler for (null) returned invalid result code 70007, referer: http://www.xxxdonotclickxxxx.com/rumjong-game-first-edition.html<br />
[Wed Sep 14 23:16:41 2011] [error] [client xx.xxx.xx.191] Handler for (null) returned invalid result code 70007, referer: http://www.xxxdonotclickxxxx.com/rumjong-game-first-edition.html<br />
[Wed Sep 14 23:18:07 2011] [error] [client xx.xxx.xx.191] Handler for (null) returned invalid result code 70007, referer: http://www.xxxdonotclickxxxx.com/card-accessories.html<br />
[Wed Sep 14 23:18:19 2011] [error] [client xx.xxx.xx.191] Handler for (null) returned invalid result code 70007, referer: http://www.xxxdonotclickxxxx.com/card-accessories.html<br />

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...but I can't seem to find anything on the forums.  I've tried to search the internet, but I just can't seem to find anything that may be the issue.<br />
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This is on a site that is now using 2.2.2 Pro.