I've been trying out the Beta2 on my intel iMac lately and found a bug. I embedded a SWF on Page 1, then another SWF on Page 2. This causes a compiler error. In code view, I can see that the error is because Catalyst assigns the same ID, "swfcontroller1," to both SWF object controllers. I can't edit this code (I assume it's a limitation in the Beta version?) to change the second one to "swfcontroller2."
This is a known issue that we'll definitely be fixing in future releases.
You can see here for this issue in the past: