problem adding multiple pdf's

[mazzeltjes]

Hi Kovid,
As of version -0.4.143 there's been a problem adding pdf's in a batch.
I've used the same bunch of files everytime and from -0.4.143 onwards
the program just hangs forever without any bug report or obvious reason.
The abort option doesn't work either.
When I close and restart a few files will be added.
Any ideas ?

edit
now I'm getting this:

reading
Detailed traceback:
Traceback (most recent call last):
File "calibre\gui2\add.pyo", line 49, in metadata_delivered
AttributeError: reading

with every book I add

[kovidgoyal]

That error message is from too olda version of calibre. Try updating to 0.5.9