The issue is still there. You still cannot use code snippets on a new line. My test environment again: Safari 1.3.2 (v312.6) on OSX 10.3.9.
I emptied cache and rebooted. I tried
http://cutesoft.net/example/general.aspx and placed the cursor after the table and tried the code snippet. I emptied cache, restarted Safari and this time put a new line and tried the code snippet. Same results - nothing happens.