Unlike the v1.1 revision (often labeled "Rev 1" on cartridges), the v1.0 ROM contains several minor localization errors:
v1.0 has unique glitches fixed in v1.1 (rare cart). Pokemon Fire Red V1.0 Us Rom
The V1.0 ROM is distinct from the later "Rev 1" (V1.1) release due to a few unique technical quirks: Unlike the v1