Upload tests fail

101 passes, 12 fails and 2 exceptions.

File attached successfully. at [/Applications/MAMP/htdocs/head/modules/upload/upload.test line 173] [Other] Fail
File attached successfully. at [/Applications/MAMP/htdocs/head/modules/upload/upload.test line 173] [Other] Fail
text-1.txt found on node. at [/Applications/MAMP/htdocs/head/modules/upload/upload.test line 50] [Other] Fail
text-2.txt found on node. at [/Applications/MAMP/htdocs/head/modules/upload/upload.test line 51] [Other] Fail
Uploaded text-1.txt is accessible. at [/Applications/MAMP/htdocs/head/modules/upload/upload.test line 185] [Browser] Fail
Uploaded contents of text-1.txt verified. at [/Applications/MAMP/htdocs/head/modules/upload/upload.test line 186] [Other] Fail
Uploaded text-2.txt is accessible. at [/Applications/MAMP/htdocs/head/modules/upload/upload.test line 185] [Browser] Fail
Uploaded contents of text-2.txt verified. at [/Applications/MAMP/htdocs/head/modules/upload/upload.test line 186] [Other] Fail
File upload record not found in database. at [/Applications/MAMP/htdocs/head/modules/upload/upload.test line 79] [Other] Fail
Unexpected PHP error [file_get_contents(/Applications/MAMP/htdocs/head/sites/default/files/simpletest52449/text-1.txt) [function.file-get-contents]: failed to open stream: No such file or directory] severity [E_WARNING] in [/Applications/MAMP/htdocs/head/modules/upload/upload.test line 186] [PHP] Exception
Unexpected PHP error [file_get_contents(/Applications/MAMP/htdocs/head/sites/default/files/simpletest52449/text-2.txt) [function.file-get-contents]: failed to open stream: No such file or directory] severity [E_WARNING] in [/Applications/MAMP/htdocs/head/modules/upload/upload.test line 186] [PHP] Exception
File sites/default/files/simpletest/text-1.txt was not allowed to be uploaded at [/Applications/MAMP/htdocs/head/modules/upload/upload.test line 109] [Other] Fail
File attached successfully. at [/Applications/MAMP/htdocs/head/modules/upload/upload.test line 173] [Other] Fail
File upload was blocked since it was larger than maxsize. at [/Applications/MAMP/htdocs/head/modules/upload/upload.test line 146] [Other] Fail
The uploaded file was not an image. at [/Applications/MAMP/htdocs/head/modules/upload/upload.test line 245] [Other] Fail
Image is displayed in user's profile page at [/Applications/MAMP/htdocs/head/modules/upload/upload.test line 307] [Other] Fail
File is located in proper directory at [/Applications/MAMP/htdocs/head/modules/upload/upload.test line 310] [Other] Fail