Serious Bugs with Android 4.1 (Jelly Bean)

[chkarg]

Dear Sirs,

I own a Galaxy Nexus. I use the SyncML Pro Client for Android to sync my PIM data with Memotoo. After the Update of the client to 2.4, I have two serious problems with your software.

1. The client does not not sync the calendar data anymore. Instead, I get an error 10500. The sync of the contacts works flawlessly.

2. After a reboot of the phone all calendars of my sysync account are deleted from the phone.

I think, the problems are related to Jelly Bean, since on my second phone with Icecream Sandwich the SyncML Pro Client works without problems.

Do you have any ideas or a solution?

Sincerely,
Christoph