Many of my visitors downloaded xf_openWeb but some of them had problems displaying modules like forum or modules which use many tables with width=”100%” or clearing elements. xf_openWeb is a 3 column full width theme using floatings to position things, there was no width set for the centercontent. This has some disadvantages while using preference table width=”100%” within the centercontent. Some browser were not able to calculate the width correct and display the content below the left block or overflow.