Can't empty trash and icon never indicates files are in the trash.

Question

What could cause this? Despite having several files in the trash, its icon never changes (always shows an empty trash) and the "Empty Trash" option is dimmed (that is, cannot be used). OnyX ws the only solution but it's temporary. What's the fix I should apply to Mac OS X?
Also, why is it that every time I want to move a file to trash I must enter my password? It's annoying to say the least.
Please help me as I don't want to go through the royal pains of installing everything again, Windows-style. I think Mac OS X should be better than that. Or is it? Let's hear it, guys and gals!
Thanks!
Fernando

Answer 1

Sorry, I posted my last message in the wrong thread without realizing it. This is what I meant to post:
Repairing the permissions of a home folder in Lion is a complicated procedure. I don’t know of a simpler one that always works.
Launch the Terminal application in any of the following ways:
☞ Enter the first few letters of its name into a Spotlight search. Select it in the results (it should be at the top.)
☞ In the Finder, select Go ▹ Utilities from the menu bar, or press the key combination shift-command-U. The application is in the folder that opens.
☞ Open LaunchPad. Click Utilities, then Terminal in the page that opens.
Drag or copy — do not type — the following line into the Terminal window, then press return:
chmod -R -N ~
The command will take a noticeable amount of time to run. When a new line ending in a dollar sign ($) appears below what you entered, it’s done. You may see a few error messages about an “invalid argument” while the command is running. You can ignore those. If you get an error message with the words “Permission denied,” enter this:
sudo !!
You'll be prompted for your login password, which won't be displayed when you type it. You may get a one-time warning not to screw up.
Next, boot from your recovery partition by holding down the key combination command-R at startup. Release the keys when you see a gray screen with a spinning dial.
When the recovery desktop appears, select Utilities ▹ Terminal from the menu bar.
In the Terminal window, enter “resetpassword” (without the quotes) and press return. A Reset Password window opens. You’re not going to reset the password.
Select your boot volume if not already selected.
Select your username from the menu labeled Select the user account if not already selected.
Under Reset Home Directory Permissions and ACLs, click the Reset button.
Select  ▹ Restart from the menu bar.