Running IETester v0.4.6.0 on Windows XP Pro v2002 SP3 with Internet Explorer v8.0.6001.18702, about every 15 minutes I receive an application failure popup and IETester closes. 
This usually occurs with the IE7 tab opened to <http://www.belpo.org>.
A typical error in the Application Log is:
Event Type:    Error
Event Source:    Application Error
Event Category:    None
Event ID:    1000
Date:        11/8/2010
Time:        1:17:21 PM
User:        N/A
Computer:    XXXXXX-XXXX-XXX
Description:
Faulting application ietester.exe, version 0.4.6.0, faulting module unknown, version 0.0.0.0, fault address 0x7e8c44af.
For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.
Data:
0000: 41 70 70 6c 69 63 61 74   Applicat
0008: 69 6f 6e 20 46 61 69 6c   ion Fail
0010: 75 72 65 20 20 69 65 74   ure  iet
0018: 65 73 74 65 72 2e 65 78   ester.ex
0020: 65 20 30 2e 34 2e 36 2e   e 0.4.6.
0028: 30 20 69 6e 20 75 6e 6b   0 in unk
0030: 6e 6f 77 6e 20 30 2e 30   nown 0.0
0038: 2e 30 2e 30 20 61 74 20   .0.0 at 
0040: 6f 66 66 73 65 74 20 37   offset 7
0048: 65 38 63 34 34 61 66 0d   e8c44af.
0050: 0a                        .
Steps to reproduce: Open the URL <http://www.belpo.org> in an IE7 tab on IETester v0.4.6.0.
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Thanks,
Glenn