Calendar (iCal) feed - wrong times when shown in Thunderbird Calendar

I sent the following line to IWantSandy:
Remind Work at Reception 9-6pm Friday @weekly

This is correctly read by Sandy, and added correctly to the appointments list with the correct times. However, when i import the iCal feed into Thunderbird (Lightening), the time shown is 17:00 to 2am the next day.

I don't think it's a caching thing, as I did this yesterday, and it's still wrong.

When I added a reminder of "Remind Work at Reception 9-1pm Saturday @weekly", the website was right, but the iCal feed said 17:00 to 21:00.

Confused. Please help.

I've also tried:
Remind Work at Reception 9-6pm Friday @weekly
Remind Work at Reception 9am to 6pm Friday @weekly

Same problem. Works on the website - not on the feed.