For those who have the HiTechnic Compass sensor - there was a bug in the “Relative Mode” logic output terminal which I reported to HiTechnic a week ago, and they have quickly fixed it and posted a new block version (v. 1.1) on their download page. If you are using the compass sensor from HiTechnic I advise you to download the new block, and use the block import wizard (part of the Dynamic Palette update) to replace the existing one.