Why Chrome and Firefox flag Bit.ly links as malware / Virus On My Site

I know most of my readers who are using firefox or chrome to access my website must have thought I have virus here on the site. Well I noticed same thing too. I felt bad seeing the message that my site is listed as suspicious, First thing that came to my mind or that will come to any blogger’s mind is ‘Hack’- a victim of someone who is not happy with what I posted or reported me to google ( Remember The Linda ikeji Saga LOL!) It got to an extent that Google plus had to send me a message/email which reads:

Dear adetona abraham,
You've recently been violating the Google+ User Content and Conduct policies.
Content that transmits viruses or contains malware or other malicious code is not allowed on Google+.
Please review our policies to avoid violating them in the future.
If you continue to violate our policies, you may lose the ability to use some or all features of Google+ and other Google services. Learn more
We're all in this together. Let's make Google+ a place where we all want to hang out.
Sincerely,
The Google+ team.

but after a little research I discovered it wasn’t me, The problem was actually from Bit.ly links, the URL Shortening service I am using. Still wondering what bitly means?

bitly is a URL shortening service. The company Bitly, Inc. was established in 2008. It is privately held and based in New York City. Bitly shortens more than one billion links per month, for use in social networking, SMS, and email.

It seems many internet users are being greeted with this following message when accessing links that emanate from the popular link-shortening service.
While Bit.ly links are working fine on Safari and Internet Explorer, the problem was initially limited to Mozilla’s Firefox and Google Chrome, though Firefox now seems to be working fine for me.
Google itself states:

“Site [Bit.ly] is listed as suspicious – visiting this web site may harm your computer. Part of this site was listed for suspicious activity 31 time(s) over the past 90 days.”

Google adds that from the 91,854 pages it tested on the site in the past three months, “669 pages resulted in malicious software being downloaded and installed without user consent.” This included 200 trojans, 185 exploits and 152 scripting exploits.
There’s no word yet on what’s causing all Bit.ly links to be blocked, however. If it had just been Chrome blocking the Bit.ly links, then one could perhaps assume that there was an over-zealous Google at play. But given that it affected Firefox too for quite a while, this suggests that there could be something a little more malicious going on from Bitly’s side, with a higher-than-usual number of miscreant sites using Bit.ly links to trick internet users.
We’ll update here with more details as and when we receive them.

UPDATE: Bit links Seem to be working fine with chrome