Hi,

I ran the following short code on two different versions of Julia and got results that are broken in different ways.

```
import Base.LinAlg.BLAS.gemm
A = convert(Array{Complex64,2}, [-6im -5im; -4 3; 2im im])
println(size(A))
println("plain *")
println(transpose(A)*A)
println(ctranspose(A)*A)
println("blas gemm")
println(gemm('t','n',A,A))
println(gemm('c','n',A,A))
```

#### output from Julia 0.4.5 (provided as a Linux Mint package)

```
(3,2)
plain *
Complex{Float32}[-24.0f0 + 0.0f0im -44.0f0 + 0.0f0im
-44.0f0 + 0.0f0im -17.0f0 + 0.0f0im]
Complex{Float32}[56.0f0 + 0.0f0im 20.0f0 + 0.0f0im
20.0f0 + 0.0f0im 35.0f0 + 0.0f0im]
blas gemm
Complex{Float32}[-24.0f0 + 0.0f0im -44.0f0 + 0.0f0im -5.835328f9 - 0.19085431f0im
-44.0f0 + 0.0f0im -17.0f0 + 0.0f0im 4.376496f9 - 0.095427155f0im]
Complex{Float32}[56.0f0 + 0.0f0im 20.0f0 + 0.0f0im -5.835328f9 + 0.19085431f0im
20.0f0 + 0.0f0im 35.0f0 + 0.0f0im 4.376496f9 + 0.095427155f0im]
```

#### output from nightly build 0.6.0-2a19c36283

```
(3, 2)
plain *
Complex{Float32}[-24.0+0.0im -44.0+0.0im; -44.0+0.0im -17.0+0.0im]
Complex{Float32}[56.0+0.0im 20.0+0.0im; 20.0+0.0im 35.0+0.0im]
blas gemm
ERROR: LoadError: DimensionMismatch("A has size (2,3), B has size (2,3), C has size (2, 3)")
Stacktrace:
[1] gemm!(::Char, ::Char, ::Complex{Float32}, ::Array{Complex{Float32},2}, ::Array{Complex{Float32},2}, ::Complex{Float32}, ::Array{Complex{Float32},2}) at ./linalg/blas.jl:1028
[2] gemm(::Char, ::Char, ::Complex{Float32}, ::Array{Complex{Float32},2}, ::Array{Complex{Float32},2}) at ./linalg/blas.jl:1042
[3] gemm(::Char, ::Char, ::Array{Complex{Float32},2}, ::Array{Complex{Float32},2}) at ./linalg/blas.jl:1045
[4] include_from_node1(::String) at ./loading.jl:539
[5] include(::String) at ./sysimg.jl:14
[6] process_options(::Base.JLOptions) at ./client.jl:305
[7] _start() at ./client.jl:371
while loading /home/me/src/jl/test-blas.jl, in expression starting on line 14
```

gemm works ok with the square matrices that I’ve tried so far.

I think I reduced the problem to a point where all possible external causes have been ruled out.

Should I go ahead and open a GitHub issue?

Thanks.

David