If suddenly the Showcase toolbar icons look completely white like this...:
...it is because the browser could not install the fonts used for the icons correctly.
In Internet Explorer this can be fixed using the following steps:
- Launch Internet Explorer.
- Select the Tools from the menu bar.
- Then select Internet Options... from the drop down menu.
- Once the internet options has loaded click on the advanced tab.
- Under security find where it says Do not save encrypted pages to disk and check it.
- Click OK.
Please be aware that this can depend on the browser used, but this should always be looked for in the settings (mostly gear-icon) and advanced settings.