It seems that one key feature of Facebook -– the ability to tag friends in status updates by using the “@” symbol –- has been broken since the social network rolled out a new publisher in conjunction with the new Facebook Questions product on Wednesday. In an e-mail to Mashable, Facebook says that the company is “working to fix the issue” and that it only affects users who have the new publisher enabled (like most major new features at Facebook, the rollout of Questions and the new publisher is a gradual one). We’ve noticed several other issues since the launch -– notably, our Facebook Page has been failing to display recent updates.

Social media management company Vitrue has announced the latest update to its enhanced and revamped Vitrue SRM (social relationship management) platform, Vitrue Publisher 2.0. What makes Vitrue Publisher 2.0 unique is not only its ability to publish and manage multiple Facebook Pages, but that it fully supports the social network’s Open Graph API . The interface has received an overhaul, and comment moderation has been made even more robust.

The e-book war between Amazon.com and Apple is getting uglier . Dennis Johnson cites a report in Publishers Marketplace (subscription required) that alleges that Amazon.com is telling publishers that if they switch to an agency model (ala Macmillan ) , they will lose Amazon as a platform for both e-books and print. This battle, which in many ways mirrors similar struggles between record labels and online music stores, underscores some of the challenges that moving into widespread digital distribution for a formerly non-digital product can bring.

This post originally appeared on the American Express OPEN Forum , where Mashable regularly contributes articles about leveraging social media and technology in small business.

The first car equipped with Google’s Android mobile operating system will hit the streets this April 23.

At last night’s “Bigg Digg Shindigg” in Austin, TX, Digg CEO Jay Adelson briefly revealed plans for a massive overhaul of the social news site. This morning, I had an opportunity to chat with Adelson in-depth about the new Digg and what users, publishers, and the web as a whole should expect. To sum it up, Adelson says the new strategy will “enable social curation of all the world’s content and the conversation around it.” To get there though, Digg has re-built its entire site from the ground up, with dramatic changes that will be rolled out over the coming weeks and months.

Sales are robust for e-readers and there is no shortage of tablets yet to launch, including the new Apple iPad . But will strong sales translate into a boost for the media industry?

This series is supported by Rackspace , the better way to do hosting. Learn more about Rackspace’s hosting solutions here . If you use WordPress for your website or blog, there are lots of ways you can connect it to social media, and connect social media to your site via those nifty plugins

A new website called PleaseRobMe.com does nothing more than aggregate publicly shared check-ins, but its name and purpose attempt to shed more light on the dangerous side effects of location-sharing. It’s no secret that when you share your location via Google Buzz and Foursquare you’re exposing information that could put you at risk.

This post is part of Mashable’s Spark of Genius series, which highlights a unique feature of startups. If you would like to have your startup considered for inclusion, please see the details here . The series is made possible by Microsoft BizSpark