Vaadin 7 on IE9

Some things to try:

• Make sure your theme correctly inherits e.g. the "reindeer" theme (probably not an issue if works on other browsers).
• Check that your widgetset (if you have a custom one) is compiled with the version of Vaadin you are using, and you have updated all static resources (theme, widgetset) if you have extracted any.
• Clear the browser cache.
• Clear server working directories (e.g. Eclipse context menu on a server has two items for clearing different temporary data).

Current Vaadin versions do pass extensive automatic tests on IE9, so this is likely to be an issue in your environment.