Hello Guys,
I have updated my ST vb4 Responsive styles with latest vBulletin 4.2.5

1. I have update modifysignature template that shown an invalid file bug with https when editing signature - Thank you JJ IGOTA
2. I fixed the italic font - Thank you Charlie Chronusmax
3. I fixed the Arabic RTL What's going on icons overlap
4. I have changed back main font to "Open Sans" previously set to "Montserrat" for text which is not consistent between screens sometimes viewed bold. Heading still using Montserrat.

You have to re-upload back style xml from style manager
and upload back the SultanThemeVB4R/css folder into your forum images/

Thank you for your support!