Where are my Apps gone? Not shown under all apps, in my phone

I have a nuumber of Android apps installed. When I use them from desktop shortcuts of phone, they work normally but in "All apps" (having up arrow symbol) section, it only shows 4 apps: Latitude, Local, Maps and Navigation. While all other apps are not there but still installed. So I am wondering that why and how that happened? I saw some other similar titled questions but they are different. I didn't hide any thing intentionally but not sure if I set some thing. Please note that I am not a layman, I am a developer so when I am doing some thing then I understand what I am doing, so I think it is some thing that did automatically, may be after and because of updates of apps. I also have app2sd card so not sure if it's related. So please some one tell if you know that how can I have my apps again under that apps section and can use it normally. My Android version is, Froyo and I'm using an HTC Wildfire.