Debugging a problem library & LC_DYLD_INFO_ONLY

So, I've got this library, when I include it in a default project under 10.5, I get the following in the console:

dyld: Library not loaded: @executable_path/../MacOS/libmine.dylib
Referenced from: /Projects2/My.app/Contents/MacOS/My
Reason: no suitable image found.  Did find:
      /Projects2/My.app/Contents/MacOS/../MacOS/libmine.dylib: unknown required load command 0x80000022
      /Projects2/My.app/Contents/MacOS/../MacOS/libmine.dylib: unknown required load command 0x80000022

The same is not true for a default project under 10.6 - that works.

I did not build the library...it was obtained from a third party.

I used otool -l to take a peek into the library and when I do this under 10.5, I see:

Load command 5
    cmd ?(0x80000022) Unknown load command
cmdsize 48
00517000 00000acc 00517acc 00000568 00518034 0001dd10 00535d44 00000340 
00536084 00096470 

When I do this under 10.6, I see:

Load command 5
          cmd LC_DYLD_INFO_ONLY
      cmdsize 48
   rebase_off 5337088
  rebase_size 2764
     bind_off 5339852
    bind_size 1384
weak_bind_off 5341236
weak_bind_size 122128
lazy_bind_off 5463364
lazy_bind_size 832
   export_off 5464196
  export_size 615536

Using lipo, I get this information about the file:

~ $lipo -detailed_info /Projects2/My.app/Contents/MacOS/libmine.dylib 
input file /Projects2/My.app/Contents/MacOS/libmine.dylib is not a fat file
Non-fat file: /Projects2/My.app/Contents/MacOS/libmine.dylib is architecture: i386


I did find one old thread about LC_DYLD_INFO_ONLY:

http://lists.apple.com/archives/xcode-users/2010/Jan/msg00339.html

but, I am not sure if I understood everything stated.

Can anyone provide some insight?

Thank you.