This update should fix Snow Leopard garbage characters, the symbol picking crash, and a few other issues. It also adds full sync data support for the Oregon 550s and Dakotas. Get it at http://www8.garmin.com/support/download_details.jsp?id=4732
The only reason this is called a beta is because there is crash that can occur when making long routes on Topo 24K map products. Fixing this issue will probably take a couple of weeks minimum, so we released this as a "beta" for now, as Snow Leopard users are justifiably tired of waiting.
As with all betas, we suggest you back up your data by exporting or you can copy the files found in ~/Library/Application Support/Garmin/BaseCamp/. You don't need to copy the directories, only the files. Once you update to this version, you shouldn't run the previous version, as the data files are not backwards compatible.