phtmlb problems in firefox

Hi,

I've created a BSP application utilizing a phtmlb menubar and popupmenu elements.

Unfortunately using a firefox the menuitems do not expand although since SP49 firefox should be supported.

I've searched in the forum and in OSS, but didn't find any hints, unless for a similar problem that showed up for the htmlb tray element, where I had to implement a server event, to handle expand and collapse.

I've checked out that the same problem occurs on the

SBSPEXT_PHTMLB demo application. Even there nothing happens when clicking on the popuptrigger or on the menubaritems.

My browser version is:

Mozilla/5.0 (Windows; U; Windows NT 5.1; de; rv:1.8.0.1) Gecko/20060111 Firefox/1.5.0.1

Any ideas would be appreciated,

Thanks,

Udo