Layout is not appearing properly in Chrome

We've been using Zero Point for several years (I'm not sure when we started, I'm pretty new to using Drupal) and the recent update has caused some layout problems with our site but only in Chrome - sidebar first (left) appears across the top of the page, then content appears across the whole page, with the second sidebar (right) appearing across the bottom. The menu tabs also appear stacked in the right corner. Is there some incompatibility of our previous use with the new version, or does something need to be changed in the settings to fix this? I've attached a screenshot of Chrome and Firefox screens. There's also an issue with adding a hyperlink in the slogan as seen in the firefox window, but I'm not concerned about that right now.