Sharepoint look and feel changed on it's own

I have a simple team site created for our IT Department to use. A few weeks back the look and feel changed on the IT site. The fonts are different, the colors changed, everything appears to be just a little bit bigger. It's very hard to describe. i have tried to change the master page to somehting else but the formatting still stays funky. This happened on its own and it started to affect people differently. It took about 3 weeks for the look to change for everyone. One other note is that there are no issues on any other site in the farm. Just this one.

Any Thoughts. I can provide screen shots but i dont know if it will help.
Who is Participating?

[Product update] Infrastructure Analysis Tool is now available with Business Accounts.Learn More

I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

Jamie McAllister MVPSharePoint ConsultantCommented:
A style sheet has been introduced or changed and that has effected the style of your site.

The reason it happened gradually for your users is that most browsers cache the stylesheets etc so changes are not visible until the cache is refreshed.

Find out who changed the stylesheet, and get them to put it back.

Maybe check the last modified date for all the stylesheet files.

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Microsoft SharePoint

From novice to tech pro — start learning today.