I use Traditional Chinese Windows 7 x64 Home Premium SP1 and Adobe Reader 11.0.02.
I don't use the "Windows Search" service and have disabled it.
Today I un-installed the old Adobe PDF iFilter 9 for x64 (from Programs and Features), restarted my PC and installed the latest PDF iFilter 11.0.01 for x64. Also, after installation, I appended to the PATH environment variable, correctly, the full path of the bin sub-folder under this new iFilter's default installation folder, i.e., C:\Program Files\Adobe\Adobe PDF iFilter 11 for 64-bit platforms\bin .
Now, in Windows Explorer, when I do a search from the serach box (at the upper righthand corner), with the syntax content:<search keyword>, no result is returned from any PDF file when I do know the <search keyword> is contained in some PDF files in the folder.
Another bad thing... I have a file searching utility called "FileSeek 3.0", which was released in April this year. After the installation of iFilter 11.0.01, now it hangs when searching PDF files.
There was no problem before today, when iFilter 9 was used.
So, anything wrong with the 11.0.01 iFilter? Or I missed something?