Here is Chat Facebook App version 1.0 for Blackberry Curve 8530 AHA/Smart World Edition. Needs a ton of work. Looks great but lacks too much to be considered a full time client for Facebook. I’m sure it will come around though.Download on here by scan this below QR code. How to scan ar folow as: 
· Open the BlackBerry App World app on your BB smartphone.
· Click the Menu key and select Scan a Barcode.
· Click Start Scanning. Point your Blackberry smartphone camera at the barcode image (above) and hold the camera steady for 3 seconds to scan it. BlackBerry App World will instantly find the app you’ve selected.
Alternative Download link : CHAT FOR FACEBOOK BB
download from Appworld : chat for fb Lite
When you view a picture and return to your news feed, it brings you back to the top. I get a lot of lagging and white screen too. Just a simple, intuitive, Facebook-inspired interface centered around the most important task – to let you chat with your Facebook friends. Fast, easy and simple.
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