bug occurring, it was confirmed that this bug was reproducible on a wide variety of Xerox WorkCentre and other high-end Xerox copiers. The source of the error was a bug in the JBIG2 implementation, which is an image compression standard that makes use of pattern matching to encode identical characters only once. While this provides a high level of compression, it is susceptible to errors in identifying similar characters. A possible workaround was published by Kriesel, which involved setting the image quality from "normal" to "higher" or "high". Shortly afterwards, it was found that the same fix had been suggested in the printer manual, which mentioned the occurrence of character substitutions in "normal mode", indicating that Xerox was aware of the software error. In Xerox's initial response to a growing interest by the media, the error was described as occurring rarely and only when factory settings had been changed. After Kriesel provided evidence that the error was also occurring in all three image quality modes (normal, higher and high) including the factory defaults, Xerox corrected their statement and released a software patch to eliminate the problem. Despite the problem being present in some instances also in higher quality mode, Xerox advises users that they can use this mode as an alternative to applying the patch. Trademark The word xerox is used as a synonym for photocopy (both as a noun and a verb) in many areas: for example, "I xeroxed the document and placed it on your desk" or "Please make a xeroxed copy of the articles and hand them out a week before the exam". Though both are common, the company does not condone such uses of its trademark, and is particularly concerned about the ongoing use of Xerox as a verb as this places the trademark in danger of being declared a generic word by the courts. The company is engaged in an ongoing advertising and media campaign to convince the public that Xerox should not be used as a verb. To this end, the company has written to publications that have used Xerox as a verb. It has also purchased print advertisements using "xerox" as a verb, claiming that "you cannot 'xerox' a document, but you can copy it on a Xerox Brand copying machine". Xerox Corporation continues to protect its trademark in most if not all trademark categories. Despite their efforts, many dictionaries continue to include