Crucible review displays text files as binary
Both Fisheye and Crucible identify text files as binary in a Perforce repository and the P4 client installed on the Fisheye server is older than 2006.1.
If only Crucible identifies text files as binary, Fisheye correctly displays them as text, and your P4 client is newer than 2006.1, then please refer to the following page:
Fisheye can communicate with any Perforce server but it needs to use the P4 command-line client to do so. There is a bug with a P4 client older than 2006.1 that incorrectly identifies text files as binary.
Upgrade to a more recent P4 client (2006.1 onwards) and set the filelog limit to 100, 50 or even 10.
Additionally, make sure you have set Fisheye to point to this client as per the instructions in the following page: