Fix FieldTest, iOS Diagnostics, AdSheet and others from showing up on Springboard, iPhone & iOS

Have you ever installed something through Installous 4 or Cydia, afterward coming back to Springboard to see some blank icons with labels like FieldTest, iOS Diagnostics, AdSheet, Setup, Intellicontainer or others which are never supposed to be showing in the first place?

Screen-shot of the libhide bug.

This issue is known and it's a bug because it happens after installing any app through your iPhone, this might apply to iPod Touch but, I'm only covering the iPhone in detail here.

The cause for this problem comes from a dylib named "libhide", from the author's description it is a library to hide icons. I do not know which version of libhide you have or had in the past so you are going to be doing some manual work here if you are to remove this bug.

Solution
1. Close all your current running apps.
2. Open SBSettings, click "More", scroll down and open "Poof", make sure that all your icons are toggled on. 1, 2, 3.
3. Now you need to install the latest version of libhide, as of 11/13/2011 the latest libhide version is 2.1.
4. You can either download it from here and install it through iFile by clicking on the .deb file and selecting install or you can open Cydia and add http://apt.thebigboss.org as a source then install it after searching for it. (If you have any trouble finding it on Cydia make sure you have Developer enabled by going to Manage > Settings > Select Developer and Click Done)
5. Open SBSettings and click "More", "Mobile Substrate Addons" make sure libhide is toggled on.
6. Now that you installed the latest version of libhide and did the above, you must hard reboot your idevice.
7. Upon restarting and unlocking you should now open SBSettings and click "More", "Mobile Substrate Addons" and toggle libhide off. (You can leave it on if you'd like, I had no need for it on) 4.
8. If you toggled it off, hard reset your device once more.
9. Upon restarting and unlocking your device, this time you should open Installous or Cydia and install an app, this should have fixed your problem and you'll no longer see those pesky icons on Springboard again.

Note: It's been reported that the icons will still appear on some devices for unknown reasons, if this is the case with yours, toggle libhide off in Mobile Substrate Addons or remove it through Cydia altogether.