Today we released BibSonomy 2.0.29 which includes some smaller updates that nevertheless might help you a lot:

• The tag search now supports the "but not" negation, i.e., you can search for posts that have some tags but not some other tags using the system tag sys:not:TAG. For example, you can get all posts that have the tag folksonomy but not the tag bookmarking by searching for folksonomy+sys:not:bookmarking.
• Firefox and Chrome add-ons now replace the well-known bookmarklets - you can get them from the buttons page.
• We included tag autocompletion on some places, including the editTags page and at the quick tag editor in post lists.
• We made the layout using less space on your screen (reload the page with Shift-F5 to see the effect).
• The QR code scanner is now also available to post publications.

Furthermore, several internal improvements and bug fixes were released, including

• an updated Spring framework
• a new method createReferences for our REST API
• a more sensitive extraction pattern for the COinS scraper
• improved QR code scanning and rendering
• HTML/CSS fixes for touch device

We hope that everything runs smoothly, if you experience any problems, please let us know!