This is a reasonably well known issue with OS 2007 (bug #1760) - it causes the metalayer-crawler service to loop and consume large amounts of CPU. metalayer-crawler is the service that indexes your media files for use with Media Player - it trawls the MMC card and also the directories under MyDocs - your symbolic link causes it recursively walk the filesystem and become stuck in /dev. Until the bug is fixed in a future update to metalayer-crawler don't create that sym link.