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IDProjectCategoryView StatusLast Update
0013522Dwarf FortressCreaturespublic2026-06-27 21:02
ReporterFar Cheny Assigned To 
PrioritynormalSeverityminorReproducibilityalways
Status newResolutionopen 
PlatformSteamOSWindowsOS VersionWindows 11 25H2
Product Version53.15 
Summary0013522: old save syndrome index mismatch after 53.15
DescriptionAn old fortress save behaves differently depending on the Dwarf Fortress version used to open it.

In the older version, several citizens have a demon sickness syndrome caused by a demon/underworld encounter. The affected units are not werebeasts and were not reported by cursecheck as werebeasts. The syndrome executes as demon sickness in that version.

When the exact same save is opened in DF 53.15, without advancing from a 53.15-saved copy, the same affected units are executed by the game as werebeasts. On the next full moon, the game itself causes them to transform as werebeasts.
Steps To ReproduceOpen the attached old save in 53.14.
Inspect Vucar Uremolon. She has demon sickness, not werebeast curse.
Open the same unmodified save in DF 53.15.
Advance to the next full moon.
The same units transform as werebeasts.
Additional InformationSave: https://dffd.bay12games.com/file.php?id=17857
Tagssyndrome

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Issue History

Date Modified Username Field Change
2026-06-27 21:02 Far Cheny New Issue
2026-06-27 21:02 Far Cheny Tag Attached: syndrome