RH7 crashes when creating a new topic

Every time I create a new topic from the TOC, RH7 crashes when I try to save it. I thought this was an issue with 64-bit Vista so I now have a new machine (Dell Latitude D630, Vista Enterprise SP2) but the same problem happens. The error message is

Faulting application RoboHTML.exe, version 7.3.1.0, time stamp 0x496b5cd9, faulting module IMAGEAPI.dll, version 7.0.145.0, time stamp 0x46f5dc83, exception code 0xc0000005, fault offset 0x00014c00, process id 0x14e4, application start time 0x01caa332e125ed58.

and the full log information is

Log Name:      Application
Source:        Application Error
Date:          01/02/2010 11:41:35
Event ID:      1000
Task Category: (100)
Level:         Error
Keywords:      Classic
User:          N/A
Computer:      jbrowning-lapto.ie.com
Description:
Faulting application RoboHTML.exe, version 7.3.1.0, time stamp 0x496b5cd9, faulting module IMAGEAPI.dll, version 7.0.145.0, time stamp 0x46f5dc83, exception code 0xc0000005, fault offset 0x00014c00, process id 0x14e4, application start time 0x01caa332e125ed58.
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="2010-02-01T11:41:35.000Z" />
    <EventRecordID>3892</EventRecordID>
    <Channel>Application</Channel>
    <Computer>jbrowning-lapto.ie.com</Computer>
    <Security />
  </System>
  <EventData>
    <Data>RoboHTML.exe</Data>
    <Data>7.3.1.0</Data>
    <Data>496b5cd9</Data>
    <Data>IMAGEAPI.dll</Data>
    <Data>7.0.145.0</Data>
    <Data>46f5dc83</Data>
    <Data>c0000005</Data>
    <Data>00014c00</Data>
    <Data>14e4</Data>
    <Data>01caa332e125ed58</Data>
  </EventData>
</Event>