Pm window issue on iPhone and iPad

[lojo]

Hi

Having problems with the box that pops up for personal messages on this site when using iPhone and iPad , the box is either only half there or is off page and can't be moved

Just in case any of the site programmers weren't aware and are interested

Or , to see if it maybe something I can sort my end if anyone knows

Whilst I'm on the topic, top site and thanks to all those who put effort in to make it so