I can start irfanview and do basic viewing and adjusting contrast, etc without too many problems but as soon as I start editing images, it's sure to crash. To recreate [more] reliably do following:
1) Open file, rescale 1024x768, sharpen, save overwriting original, right-arrow (next file),
2) rescale 1024x768, sharpen, F12, Add text to image
3) CRASH. If not, repeat a few more #2's and it will DEFINITELY crash for me.

I find it very interesting that crash reason is always the same and offset stays very consistent, even across versions.

BTW, I'm running Windows 7 64 bit (that seems to be key), vanilla system, plenty ram & disk.

Since can't seem to attach a txt file, contents below:


======================================= 4.28 ===================================
=============== Exception Offset: 000cea27
Problem signature:
Problem Event Name: APPCRASH
Application Name: i_view32.exe
Application Version: 4.2.8.0
Application Timestamp: 4d08e831
Fault Module Name: StackHash_6095
Fault Module Version: 6.1.7600.16695
Fault Module Timestamp: 4cc7ab86
Exception Code: c0000374
Exception Offset: 000cea27
OS Version: 6.1.7600.2.0.0.256.4
Locale ID: 1033
Additional Information 1: 6095
Additional Information 2: 609547b581279f60bb46426a26921ff8
Additional Information 3: 1d4f
Additional Information 4: 1d4f00e873305eeb452f08ae5c60e7cd

Problem signature:
Problem Event Name: APPCRASH
Application Name: i_view32.exe
Application Version: 4.2.8.0
Application Timestamp: 4d08e831
Fault Module Name: StackHash_6095
Fault Module Version: 6.1.7600.16695
Fault Module Timestamp: 4cc7ab86
Exception Code: c0000374
Exception Offset: 000cea27
OS Version: 6.1.7600.2.0.0.256.4
Locale ID: 1033
Additional Information 1: 6095
Additional Information 2: 609547b581279f60bb46426a26921ff8
Additional Information 3: 1d4f
Additional Information 4: 1d4f00e873305eeb452f08ae5c60e7cd

=============== Exception Offset: 000ce653

Problem Event Name: APPCRASH
Application Name: i_view32.exe
Application Version: 4.2.8.0
Application Timestamp: 4d08e831
Fault Module Name: StackHash_6095
Fault Module Version: 6.1.7601.17514
Fault Module Timestamp: 4ce7ba58
Exception Code: c0000374
Exception Offset: 000ce653
OS Version: 6.1.7601.2.1.0.256.4
Locale ID: 1033
Additional Information 1: 6095
Additional Information 2: 609547b581279f60bb46426a26921ff8
Additional Information 3: 1d4f
Additional Information 4: 1d4f00e873305eeb452f08ae5c60e7cd

Problem Event Name: APPCRASH
Application Name: i_view32.exe
Application Version: 4.2.8.0
Application Timestamp: 4d08e831
Fault Module Name: StackHash_6095
Fault Module Version: 6.1.7601.17514
Fault Module Timestamp: 4ce7ba58
Exception Code: c0000374
Exception Offset: 000ce653
OS Version: 6.1.7601.2.1.0.256.4
Locale ID: 1033
Additional Information 1: 6095
Additional Information 2: 609547b581279f60bb46426a26921ff8
Additional Information 3: 1d4f
Additional Information 4: 1d4f00e873305eeb452f08ae5c60e7cd

Problem Event Name: APPCRASH
Application Name: i_view32.exe
Application Version: 4.2.8.0
Application Timestamp: 4d08e831
Fault Module Name: StackHash_6095
Fault Module Version: 6.1.7601.17514
Fault Module Timestamp: 4ce7ba58
Exception Code: c0000374
Exception Offset: 000ce653
OS Version: 6.1.7601.2.1.0.256.4
Locale ID: 1033
Additional Information 1: 6095
Additional Information 2: 609547b581279f60bb46426a26921ff8
Additional Information 3: 1d4f
Additional Information 4: 1d4f00e873305eeb452f08ae5c60e7cd

Problem Event Name: APPCRASH
Application Name: i_view32.exe
Application Version: 4.2.8.0
Application Timestamp: 4d08e831
Fault Module Name: StackHash_6095
Fault Module Version: 6.1.7601.17514
Fault Module Timestamp: 4ce7ba58
Exception Code: c0000374
Exception Offset: 000ce653
OS Version: 6.1.7601.2.1.0.256.4
Locale ID: 1033
Additional Information 1: 6095
Additional Information 2: 609547b581279f60bb46426a26921ff8
Additional Information 3: 1d4f
Additional Information 4: 1d4f00e873305eeb452f08ae5c60e7cd

Problem Event Name: APPCRASH
Application Name: i_view32.exe
Application Version: 4.2.8.0
Application Timestamp: 4d08e831
Fault Module Name: StackHash_b7de
Fault Module Version: 6.1.7601.17514
Fault Module Timestamp: 4ce7ba58
Exception Code: c0000374
Exception Offset: 000ce653
OS Version: 6.1.7601.2.1.0.256.4
Locale ID: 1033
Additional Information 1: b7de
Additional Information 2: b7de51d385d8843b01c5b7702cd9b949
Additional Information 3: d48f
Additional Information 4: d48f876e23eb279ffdb08f4ad0484e9d

======================================= 4.30 ===================================
=============== Exception Offset: 000ce653

Problem Event Name: APPCRASH
Application Name: i_view32.exe
Application Version: 4.3.0.0
Application Timestamp: 4df9e6d8
Fault Module Name: StackHash_6dfb
Fault Module Version: 6.1.7601.17514
Fault Module Timestamp: 4ce7ba58
Exception Code: c0000374
Exception Offset: 000ce653
OS Version: 6.1.7601.2.1.0.256.4
Locale ID: 1033
Additional Information 1: 6dfb
Additional Information 2: 6dfbb76818baf47dcf7f98520e227084
Additional Information 3: f425
Additional Information 4: f425de8461626eeebe435c6db829cfd3

Problem signature:
Problem Event Name: APPCRASH
Application Name: i_view32.exe
Application Version: 4.3.0.0
Application Timestamp: 4df9e6d8
Fault Module Name: StackHash_bf98
Fault Module Version: 6.1.7601.17514
Fault Module Timestamp: 4ce7ba58
Exception Code: c0000374
Exception Offset: 000ce653
OS Version: 6.1.7601.2.1.0.256.4
Locale ID: 1033
Additional Information 1: bf98
Additional Information 2: bf9866678386320e5c555d48fbb6b71d
Additional Information 3: f078
Additional Information 4: f078fba6685278e36c7f1616f0723828

To recreate [more] reliably do following:
1) Open file, rescale 1024x768, sharpen, save overwriting original, right-arrow (next file),
2) rescale 1024x768, sharpen, F12, Add text to image
3) CRASH. If not, repeat a few more #2's and it will DEFINITELY crash for me.

Problem signature:
Problem Event Name: APPCRASH
Application Name: i_view32.exe
Application Version: 4.3.0.0
Application Timestamp: 4df9e6d8
Fault Module Name: StackHash_bf98
Fault Module Version: 6.1.7601.17514
Fault Module Timestamp: 4ce7ba58
Exception Code: c0000374
Exception Offset: 000ce653
OS Version: 6.1.7601.2.1.0.256.4
Locale ID: 1033
Additional Information 1: bf98
Additional Information 2: bf9866678386320e5c555d48fbb6b71d
Additional Information 3: f078
Additional Information 4: f078fba6685278e36c7f1616f0723828