Table Header in Firefox 9, Vaadin 6.7.4

The header of tables are not displayed correctly in Firefox 9. The captions are not visible. See sampler application using FF9.
OS: Win7, 32bit.

Edit:
After rebuilding my app and tables work fine using 6.7.4.
Still the sampler application doesnt show the headers correctly. (e.g. http://demo.vaadin.com/sampler/VAADIN/#TableColumnAlignment)
If the sampler is using 6.7.3 then only 6.7.3 might be affected.

Hi, Sampler is still running 6.7.2 actually - will be updated to 6.7.4 shortly. Still, I can't see any issues in http://demo.vaadin.com/sampler/#TableColumnAlignment except if you zoom out (this should be fixed in 6.7.4)

You are perfectly right. I checked all could think of before posting but I didnt notice that I hadnt had the normal size view. Sorry for any inconvenience.
thx for infos.