[tilia]

I've always had some books I couldn't send from calibre to Marvin. A couple of them had coding problems, but not all. This had gotten worse lately, and almost every book I tried transferring gave an error. Even books that had worked previously.

Because of this, I tried uninstalling the plugin. Now I get the following error when I connect marvin with calibre:

Spoiler:

calibre, version 1.48.0
ERROR: Error: Error communicating with device

'utf8' codec can't decode byte 0xf8 in position 47: invalid start byte

Traceback (most recent call last):
File "site-packages\calibre\gui2\device.py", line 86, in run
File "site-packages\calibre\gui2\device.py", line 490, in _books
File "C:\Users\Jane\AppData\Local\Temp\calibre_sj_qvw\i athz8_ios_local_db\Marvin_overlays.py", line 435, in books
File "calibre_plugins.ios_reader_apps.__init__", line 1392, in _log_metrics
UnicodeDecodeError: 'utf8' codec can't decode byte 0xf8 in position 47: invalid start byte

After dismissing the error message, I can add books to Marvin, but the next time I connect I get the same error and no books are shown as on the device.

Win 7, calibre 1.48 and an ipod touch 5th gen.
I've also tried uninstalling Marvin, nothing changed.