Some info I pulled from the Windows event viewer about the crashes:
Code:
Event Type:	Error
Event Source:	Application Error
Event Category:	None
Event ID:	1000
Date:		3/20/2006
Time:		1:10:49 PM
User:		N/A
Computer:	NONE
Description:
Faulting application mirc.exe, version 6.1.7.0, faulting module ssleay32.dll, version 0.0.0.0, fault address 0x000116a4.

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 6d 69 72   ure  mir
0018: 63 2e 65 78 65 20 36 2e   c.exe 6.
0020: 31 2e 37 2e 30 20 69 6e   1.7.0 in
0028: 20 73 73 6c 65 61 79 33    ssleay3
0030: 32 2e 64 6c 6c 20 30 2e   2.dll 0.
0038: 30 2e 30 2e 30 20 61 74   0.0.0 at
0040: 20 6f 66 66 73 65 74 20    offset 
0048: 30 30 30 31 31 36 61 34   000116a4
0050: 0d 0a                     ..      
  

Code:
 
Event Type:	Error
Event Source:	Application Error
Event Category:	None
Event ID:	1000
Date:		3/18/2006
Time:		6:55:36 PM
User:		N/A
Computer:	NONE
Description:
Faulting application mirc.exe, version 6.1.7.0, faulting module ntdll.dll, version 5.1.2600.2180, fault address 0x00010f29.

For more information, see Help and Support Center at [url=http://go.microsoft.com/fwlink/events.asp.]http://go.microsoft.com/fwlink/events.asp.[/url]
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 6d 69 72   ure  mir
0018: 63 2e 65 78 65 20 36 2e   c.exe 6.
0020: 31 2e 37 2e 30 20 69 6e   1.7.0 in
0028: 20 6e 74 64 6c 6c 2e 64    ntdll.d
0030: 6c 6c 20 35 2e 31 2e 32   ll 5.1.2
0038: 36 30 30 2e 32 31 38 30   600.2180
0040: 20 61 74 20 6f 66 66 73    at offs
0048: 65 74 20 30 30 30 31 30   et 00010
0050: 66 32 39 0d 0a            f29..


Just before today's crash (the one with SSL), I was disconnected from 2 networks, one with SSL:
Quote:
387 [13:10:42] * [10053] Software caused connection abort
388 -
389 [13:10:42] * Disconnected
390 -
391 [13:10:42] * [10101] Host disconnected
392 -
393 [13:10:42] * Disconnected


One without:
Quote:
524 -
525 [13:10:41] * [10053] Software caused connection abort
526 -
527 [13:10:41] * Disconnected


mIRC 6.21 - Win XP Pro (SP2) - 2.4 Ghz - 1 GB Mem
irc.x-tab.org