Hi,
It's great to see K2 getting updated.

I'm using K2 v2.10.1 and i thing there is a problem with item attachment.
When adding a PDF file, the file is being uploaded to media/k2/attachments but it is being changed from xxx.pdf to xxx.txt
This is also how it appears in the k2 item after the upload.
As a result, the file can't be opened on the front-end.
I have tested with several PDF files - same result.

Thank you

It's doing this to me too. On three different sites with K2 installed. ANY pdf uploaded as an attachment to a K2 article is having it's filename changed to .txt... HELP!

Just FYI, this is not fixed in the new version x.2 that was just released. I updated, tried it and it still rewrites the title as .txt

same result :(
updated to K2 v2.10.2 and still .pdf turns to .txt