The Timed offset TextBox in (for example) the Edit action - run script () dialog seems to be checking the value as it is typed, and also disallows a - (minus sign) character, giving this Application Error:
'-' is not a valid integer value
10 June 2008, 02:45:03
Program Version 2.1.45 Build 509
Call stack:
(000096E1) [0040A6E1]
(0000A6FC) [0040B6FC]
(003E46EB) [007E56EB]
(00047600) [00448600]
(000476F2) [004486F2]
(00071463) [00472463]
(0007532E) [0047632E]
(000752B9) [004762B9]
(000710F0) [004720F0]
(000753EF) [004763EF]
(00075B63) [00476B63]
(000898D4) [0048A8D4]
(00071463) [00472463]
(00074A59) [00475A59]
(0000382F) [0040482F]
(00071463) [00472463]
(000752B9) [004762B9]
(00086D8D) [00487D8D]
(00022AD8) [00423AD8]
(0003A6A4) [0043B6A4]
(00074A44) [00475A44]
(00074A59) [00475A59]
(0002E4D4) [0042F4D4]
(000752B9) [004762B9]
(00086D8D) [00487D8D]
(00074A44) [00475A44]
(0002E4D4) [0042F4D4]
(000752B9) [004762B9]
(0007539B) [0047639B]
(00047635) [00448635]
(00076AF1) [00477AF1]
(00071463) [00472463]
(000752B9) [004762B9]
(000710F0) [004720F0]
(000773EE) [004783EE]
(00071463) [00472463]
(000752B9) [004762B9]
(00074A44) [00475A44]
(0002E4D4) [0042F4D4]
(0008E700) [0048F700]
(0008E9A0) [0048F9A0]
(0008E9E2) [0048F9E2]
(0008AFE3) [0048BFE3]
(001BBF95) [005BCF95]
(0006645B) [0046745B]
(0006795F) [0046895F]
(00068ABE) [00469ABE]
(00068A0D) [00469A0D]
(0002E4D4) [0042F4D4]
(0008E9A8) [0048F9A8]
(0008E9E2) [0048F9E2]
(0008AFE3) [0048BFE3]
(001BEBA7) [005BFBA7]
(0002DE33) [0042EE33]
(0008027D) [0048127D]
(00080F44) [00481F44]
(0002DCFF) [0042ECFF]
(00071951) [00472951]
(000BABC0) [004BBBC0]
(00071DE3) [00472DE3]
(00071463) [00472463]
(0000E602) [0040F602]
(000710F0) [004720F0]
(00074B3A) [00475B3A]
(00074C02) [00475C02]
(000710F0) [004720F0]
(00074E0D) [00475E0D]
(00075173) [00476173]
(000BCB51) [004BDB51]
(000BCB92) [004BDB92]
(000BF3D9) [004C03D9]
(00074A44) [00475A44]
(0002E4D4) [0042F4D4]
(0002ED4E) [0042FD4E]
(0008E9A8) [0048F9A8]
(0008E9E2) [0048F9E2]
(0008AFE3) [0048BFE3]
(001C0343) [005C1343]
(00071DE3) [00472DE3]
(00071463) [00472463]
(00074D7F) [00475D7F]
(000752B9) [004762B9]
(00074A44) [00475A44]
(0002E4D4) [0042F4D4]
(0002ED4E) [0042FD4E]
(0008E9A8) [0048F9A8]
(0008E9E2) [0048F9E2]
(0008EC02) [0048FC02]
(004CDAE7) [008CEAE7]Backspacing to delete the minus sign gives a similar error (’’ is not a valid integer value).
I have added this bug to Mantis. 
BFN
CAD