Some readers noticed that the Programming Windows Phone 7 ebook posted last Thursday didn't display correctly on Mac's and iPad's as a result of an embedded font problem. My publisher informs me that the font issue has been fixed, and the new version is available at the same link as the previous version:
Programming Windows Phone 7
Also, you might encounter problems when unzipping the sample code due to limits on total directory name lengths. Shortening the name of the ZIP file — or removing that name from the default unzipping directory — will help.