After Ville's recent change to the PACK opcode:

Brett Hull Hockey - does this just before entering in-game
Code
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Exception at EIP=00C2665C (jaguar_state::scanline_update(int)+0x031c): ACCESS VIOLATION
While attempting to write memory at E633AC30
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EAX=0000005C EBX=00000002 ECX=0000005C EDX=26042600
ESI=00000000 EDI=0499A4F0 EBP=E633AAC0 ESP=0022BA80
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Stack crawl:
  0022BAA8: 00C2665C (jaguar_state::scanline_update(int)+0x031c)
  0022BAAC: 76E56500 (wcsnicmp+0x0c74)
  0022BAB0: 76E56536 (wcsnicmp+0x0caa)

SpaceWar 2000 - now does this:
Code
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Exception at EIP=00C28834 (jaguar_state::generic_blitter(unsigned int, unsigned int, unsigned int)+0x1e54): ACCESS VIOLATION
While attempting to read memory at 0C1E24BC
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EAX=0140004A EBX=00000020 ECX=013FFEC3 EDX=000000C7
ESI=00D70000 EDI=00C758EB EBP=099E2428 ESP=0022BE00
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Stack crawl:
  0022BEEC: 00C28834 (jaguar_state::generic_blitter(unsigned int, unsigned int, unsigned int)+0x1e54)
  00000000: 00800000 (m20_state::install_memory()+0x1f30)

Phase Zero - no longer boots
Barkley Shut Up and Jam! - spams commandline with "Invalid branch!" before entering match (hangs mess, needs hard reset)