[Plugin: NextGEN Gallery] Singlepic doesn´t work

I got a little problem with using WP Minify and Nextgen at the same time… actually I´m just looking for the right CSS or JS to exclude in the WP Minify-Administration. (that´s what I hope, the reason for my problem)

I got a article with 2 pictures in it.

I put them in, using the code [singlepic id=38 w=320 h=240 float=left].

If you click on the little picture, the big picture appears as it should – the problem is now: I only see the effect as it should, but not the little picture(thumbnail)!

The strange thing is, all my other nextgen gallerys are shown correctly if I click on the singlepicture – only the “singlepic” itself not.

I also found out, it´s just enough to activate the WP Minify Plugin to get this effect/bug, without using any options of WP Minify !?

Is there anyone who use both plugins without any problems?
Please help me…