ExpressionEngine 2.5.3, Assets 2.0.
I also have a ticket into ElectricPutty's support but they suggested that since Assets is supported natively by BWF now, that I post it here.
When previewing changes to a BWF managed entry, the following PHP warnings are shown in the preview modal:
A PHP Error was encountered Severity: Warning
Message: trim() expects parameter 1 to be string, array given
Filename: libraries/Functions.php
Line Number: 2711
A PHP Error was encountered Severity: Warning
Message: trim() expects parameter 1 to be string, array given
Filename: libraries/Functions.php
Line Number: 2711
A PHP Error was encountered Severity: Warning
Message: Cannot modify header information - headers already sent by (output started at /Volumes/Macintosh >HD/Users/iso100/Sites/pbsmartsuite/public_html/_system/codeigniter/system/core/Exceptions.php:170)
Filename: core/Common.php
Line Number: 412
If I save the draft and try to visit the same entry again to edit it, I get a blank page with only this error:
Fatal error: Call to a member function file_id() on a non-object in /Volumes/Macintosh HD/Users/iso100/Sites/pbsmartsuite/public_html/third_party/assets/views/thumbview/files.php on line 15