Emulator

Not even when using DSP LLE?

And please lists the revision that it stopped working on... Even better, please link to it! The whole point of issue reports is to make it as easy as possible on the developer who chooses to go after the issue! It also shows that you actually have tried them, instead of assuming.

EDIT: 4.0-7286?

No, only with HLE, and yes, it's 4.0-7286. This issue has been fairly well-known since the NZHLE merge, but it hasn't been on the issue tracker until now. The ucode that the game uses isn't in the list of ucode CRCs anymore since the rewrite. I've heard someone say that just re-adding it there wasn't enough to make it work, but other than that, I don't know much about it.

Just adding it back doesn't help the µcode, as it seems to feature some unknown or different layout to the others. I tried a bunch of different flag combinations that seemed feasible and dropped the problem after not getting the IDA Plugin to work again.
Depending on the flags, it either stops right away with unknown opcodes, an unsupported command sequence, or it simply HALTs after throwing a bunch of unknown/unexpected mails.