LC 4.5 script corruption on Linux

[Richmond]

Today, for the first time, I opened the script of a stack I was working 
on yesterday
and found the script had been corrupted . . .

Livecode 4.5 on UbuntuStudio 13.04

Opening it in LC 6.1 Community I found the corrected version did not 
become corrupted.

As someone who, at present, does not have the money for the commercial 
version of LC 6.1 and depends
on 4.5 this is a large problem.

Richmond.