The size of the archive shouldn't matter here. What might be a problem is the number of files in the archive and the number of file file types (each file type adds its icon to the output.) Also the QL framework (or probably WebKit which is used for rendering the output) seems to leak memory. Anyway, I am aware that BetterZipQL needs to fall back on a simpler version for larger archives (no collapsable folders, etc.) The next version will handle this better.

Does the request work when you try a second time after you got this message? How many files are in your big RAR file?

It doesn't work if I try a second time after this message. Also, 500 KB .tar.bz files give the same warning (but them with 442 MB of memory).

The RAR contains at least 20.000 files (I stopped the counter when it went past that..), it is mostly jpeg, doc and pdf files,

Ah okay, 20.000 files is a lot. I can imagine that this doesn't work. I will add a more graceful solution for such huge files. I don't know why the 500 kB file doesn't work, but of course, the same applies here. If the file contained 20.000 very small files, it would lead to the same problem. If you like, send me the file by mail, and I'll have a look.

I'll try it again next week. I don't have access to the network share where the file is located at the moment. (smb share)

I did try the very large rar file first, everything after that which used your plugin kept crashing. Might work now I have rebooted, it does on other rar files I have on my system.

Can't send you the file, it's a backup from work I'd rather not spread around... Boss might not be very happy with me, if I do.

I understand. Let me know what you find out. Thanks!

The smaller files work fine, the plugin just doesn't work anymore after I try to Quicklook on the bigger file.

After Leopard's QL framework has to kill the BetterZipQL plug-in because of the memory usage, it probably decides that the plug-in doesn't work at all instead of restarting it the next time you use it. For now, try to steer clear from archives with a huge number of files. I will fix the problem in the next version.