Looking on NetBeans Issue Tracker for "frozen ide" (no quotes) in summary doesn't find issue #224114, whose summary is "[73cat] Frozen IDE"
Product Version = NetBeans IDE Dev (Build 20121220-4f53a116c76b)
Operating System = Windows 7 version 6.1 running on amd64
Java; VM; Vendor = 1.7.0_07
Runtime = Java HotSpot(TM) 64-Bit Server VM 23.3-b01
Looking for frozen works.
fixed in core-main #301717973fe2
Integrated into 'main-golden', will be available in build *201301080001* on http://bits.netbeans.org/dev/nightly/ (upload may still be in progress)
User: Tomas Stupka <firstname.lastname@example.org>
Log: Issue #224240 - [73cat] Find issues is broken when searching for more than one word