v3,8 gives me this error on synchro:
TypeError: cannot concatenate 'str' and 'NoneType' objects

the log in xterm follows:

~ $ mcalendar
09
9
0
current datetime updated
UpdateList
byday : None
---
Dinner party
2008-08-13 00:00:00
2008-08-13 00:00:00
Starting <_Thread(Google Calendar Sync, initial)>
Running <_Thread(Google Calendar Sync, started)>
Delete google event deleted locally
test

aaadc312-545e-48da-aa5c-86b5d3faaa44
load
A&L Transfer £1300
2008-08-11 19:04:00
old uuid : aaadc312-545e-48da-aa5c-86b5d3faaa44
uuid to update on google : aaadc312-545e-48da-aa5c-86b5d3faaa44
Traceback (most recent call last):
File "/usr/lib/mcalendar/mcalendar_main.py", line 312, in run
recurrence_data = recurrence_data + ";BYDAY=" +e.repeat_byday
TypeError: cannot concatenate 'str' and 'NoneType' objects
None
UpdateList
byday : None
---
Dinner party
2008-08-13 00:00:00
2008-08-13 00:00:00
<_Thread(Google Calendar Sync, stopped)> completed. 0 running, 0 pending
~ $