On 11 Jan 2010, at 09:55, Andrew Hill wrote:
The file that it claims does not exist definitely exists, but in the error message that was output in my document, there was a diamond character immediately after "thesis.tex", visible because i have the "Show Invisibles" TextMate setting enabled. I copied the text including the diamond character and pasted it into a web-based ascii-to-hex converter (http://centricle.com/tools/ascii-hex/ ) and it seems to be the character %0A
0x0A is not shown as a diamond with show invisibles.
Try instead to select the diamond in TextMate and press ⌃⇧X to convert it to hexadecimal.