Back in December, the OK issued its own response to the claims of bugs in the tropicana juice. I am copying and pasting their statement from another site, but you can find it yourself with your own browser.
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The OK Kosher certification, headed by Rabbi Don Yoel Levy, has released the following statement on Friday, December 5, 2014:
OK Kosher stands behind the kosher status of all Tropicana juices bearing the OK symbol.
In response to recent reports relating to Tropicana juices, the OK tested the juices and also had them tested by an independent and knowledgeable posek, and all agreed that there are no halachic kashrus issues.
In addition an independent laboratory tested the juices and found no traces of insects.
As always, consumers can rest assured that any product bearing the OK symbol is kosher without compromise.