GIMP/GLib multi user problems

[Meul Wim <Wim Meul KdG be>]

We deliver the GIMP (v2.8.2) in our Citrix XenApp 6.0 environment to our students.
The GIMP is locally installed on each XenApp Server.
As long as only 1 student is using GIMP on a server, everything went good. When more users use GIMP on the same server, GIMP crashes randomly. Always libglib-2.0.0.dll is the faulting module.
In the application log on the server is following error logged:

Log Name:      Application
Source:        Application Error
Date:          19/12/2012 13:30:15
Event ID:      1000
Task Category: (100)
Level:         Error
Keywords:      Classic
User:          N/A
Computer:      xxx
Description:
Faulting application name: gimp-2.8.exe, version: 2.8.2.0, time stamp: 0x50369de7
Faulting module name: libglib-2.0-0.dll, version: 2.32.3.0, time stamp: 0x4ff58552
Exception code: 0x40000015
Fault offset: 0x000000000004fd12
Faulting process id: 0x5d1c
Faulting application start time: 0x01cddde3ce590984
Faulting application path: E:\Program Files\GIMP 2\bin\gimp-2.8.exe
Faulting module path: E:\Program Files\GIMP 2\bin\libglib-2.0-0.dll
Report Id: d6db53db-49d7-11e2-aa47-ac162d6f557e
Event Xml:
<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event";>
  <System>
    <Provider Name="Application Error" />
    <EventID Qualifiers="0">1000</EventID>
    <Level>2</Level>
    <Task>100</Task>
    <Keywords>0x80000000000000</Keywords>
    <TimeCreated SystemTime="2012-12-19T12:30:15.000000000Z" />
    <EventRecordID>5672684</EventRecordID>
    <Channel>Application</Channel>
    <Computer>xxx</Computer>
    <Security />
  </System>
  <EventData>
    <Data>gimp-2.8.exe</Data>
    <Data>2.8.2.0</Data>
    <Data>50369de7</Data>
    <Data>libglib-2.0-0.dll</Data>
    <Data>2.32.3.0</Data>
    <Data>4ff58552</Data>
    <Data>40000015</Data>
    <Data>000000000004fd12</Data>
    <Data>5d1c</Data>
    <Data>01cddde3ce590984</Data>
    <Data>E:\Program Files\GIMP 2\bin\gimp-2.8.exe</Data>
    <Data>E:\Program Files\GIMP 2\bin\libglib-2.0-0.dll</Data>
    <Data>d6db53db-49d7-11e2-aa47-ac162d6f557e</Data>
  </EventData>
</Event>


Can someone give me some info to troubleshoot it further?

I've also posted this message in de mailing list gimp-user-list, but they advised me to ask the question here.
A possible reason could be a memory leak (was mentioned in the gimp-user-list mailing list), but we have never got warnings in our monitoring system about the RAM there (system has 64GB ram).

MvG,
Wim
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