Is this within a c program or c++? and with char * strings, not QStrings or ... 
I'm assuming gdb 5.3? (but I suspect this isn't an issue here). 
 
Could you try using gdb at the command line and see what it says for those 
strings that are printed incorrectly as I'm relying on gdb (without any tricks) 
to print char * strings. 
 

The code is C and using char*... I compared the results of the variable view and
the gdb view and it was not equally displayed... (I assume the variable view is
buggy...)

The gdb version is 5.3.20030606-2 (Debian), on i386.

Note that, the last character of the strings was duplicated 3 times in all cases
when this error occured...

One more question :-) 
 
If you pop up the GDB tab in the output views what does the command and output 
look like for the strings printed incorrectly? 
 
jbb 
 

So here is an example of the error:

The real string is "abc".

Variables view:
varname          "abc..." where ... is a noisy random character

GDB view:
(gdb) print varname
$42 = "abc\000...", where ... is exactly the same random string as in the
Variables view

I have 5 strings displayed, and the error occurs in only one case...

Ah - I think I see what the problem is now 
 
varname is not a char* but a char[6]. If that is the case, then the error is 
that I'm stripping the \000 from the characters. 
 
You must be getting the same thing when running from the command line? 
 
Also try adding a watch variable of "(char*)varname". This should print "abc" 
(ie treated as a string.) 
 
jbb 
 

In SVN HEAD, for

  char p14[6] = "abc";

I get abc\000\000 in the variables widget, which is probably not nice but is exactly what gdb says. Can you check if the problem you report is there?

No feedback, was working last time I've tried, closing.