Last week, CCleaner 4.11 stopped detecting FF28's cache during analysis. This week, I updated to 4.12 and still have the same problem. I did increase the cache size from 350 MB to 1000MB prior to 4.12's installtion. I'm using Windows XP SP3.
what does ccleaner show for FF cache during analyze and clean?
does you set FF to clean its cache when close?
Try purging Firefox's cache from within Firefox (press control+shift+delete to open the dialog, select "everything," tick the Cache box and hit clean) then try again.
Ok, I find the solution. Somehow, "Clear History When Firefox Closes" under "Privacy" in "Options" was checked. In the "Settings" of "Clear History," "Cache" was checked. Every since I started using CCleaner almost 4 years ago, I never checked "Clear History" for obvious reasons. "Unchecking "Clear History" fixed the problem as CCleaner showed the cache after analysis.
The strange thing is that "Internet History" did appear in the analysis despite that it was unknowingly checked and obviouisly not cleared when Firefox closed.