Platform has reached the end of its life cycle. We urge you to upgrade quickly to PageLines Framework to ensure continuity of your site. The next WordPress update is anticipated to cause Platform to break down. No updates will be offered, should that happen.
Unfortunately, support is extremely limited at this time. We maintain our code to be concurrent with all major browsers, but when they change, and we do, some things do get lost in older, outdated products. There may be a browser-specific CSS issue, but unfortunately, no specific solution here. You can try deactivating plugins, as one of them may be causing the issue.
Upgrading to PageLines Framework would likely resolve your issue.