linux client lightbox


i have a problem with the scheduler and a linux client. I use firefox in fullscreen mode.
If i open a standard lightbox and i click on the combobox time in time period, the dropdown list is for a shortly moment in the left top corner of the window and then on the correctly position. I use the dhtmlx scheduler 2.6 pro version. The problem exist with the version 3.0 standard too.

Is issue occurs in standard sample or only with your custom code?
In second case please provide any kind of sample or demo link where issue can be reconstructed.

The problem exist in the standard samples. For example 05_calendar/03_in_form.html, 01_initialization_loading/01_basic_init.html
The problem exist on all comboboxs for time period and the problem exist in firefox fullscreen mode (key F11).