Using the (L)ookup function of ispell with a wildcard, for example bl*, should return a list of words in the dictionary beginning with bl. Instead, the user is returned to the ispell menu. This works correctly in RedHat 5.2. rpms installed: ispell-3.1.20-22 words-2-12
The problem is caused by ispell looking for grep in /usr/bin instead of /bin. I sent a message to redhat-devel-list with a patch that fixes it.
Will be fixed in ispell-3.1.20-23 and later. Thanks, msterret!
Fixed in rawhide.