IDL 8.6.1 was released today1. Some interesting new features:

• Conditional breakpoints from the Workbench
• Hexadecimal constants, e.g., a = 0xFF3A
• Fix for strings that begin with numerals being confused with the octal notation: "123 is an octal value; "123" used to be a syntax error, but is now a valid string.

See the release notes for details.

1. Really sometime in the last week or so. The announcement on the newsgroup was today, but the release notes was posted 7/27.