Hello,
Your problem may have multiple origins, and I have no idea where you could start :
- Did you use the correct directories for messages and index for _both_ the import and the server ? (sorry if this sounds stupid)
- Did the index size in heliotrope change ? (as given by a GET to /size.json)
- Did the messages file size change ?
- Are the messages absent in inbox only or from the whole turnsole ?
- As a last resort, could you send the mbox file so that I can try this at home, if your mails aren't too personal ?