I just did a google on my little problem and found this
rm -fr /home/user/.trash
That seemed to clean out trash however checking the size of available 
space shows no increase in space. I had 24G free originally and 
despite deleting some 20G of folder/files, I expected to see 44G of 
free space available.
On 18/12/11 04:21 PM, John Lindsay wrote:
Since my upgrade to Squeeze, I have discovered ALL previous deleted 
files and folders plus recently deleted (since upgrade) show up in 
trash and I can't delete them. I get a 'file operations' window with 
a bar graph that says preparing but when checked -- everything is 
still there. There is some 20G of folders and files that need to be 
removed to free up HD space. Any suggestions?
John
Just checked some files and I as the user have only read only 
permission -- I know I should change ownership to read/write -- 
before I try this -- 'chown ve3sjv /Desktop/Trash'  Is that where 
Trash resides and is that the correct format?