graphical float placements

[fmsal...@virginmedia.com]

Hullo,
    Using distribution openSUSE 13.2 but not the rpm's for tex and 
lyx.  TexLive 2014 installed and lyx 2.1.2 compiled locally..

    I am writing a document of about 50 pages with many pages of 
mathematics using koma-script report.  I keep experiencing erratic 
behaviour with the placement of graphical floats. The graphics are png 
files.

    At times some greying out of options for the placement and sizing 
of the plots occurs and at other times there are no problems at all.   
Also apparently an acceptable setting of alternatives are ignored!   I 
have not been able to observe any common factors in what I have done.

    At other times the floats are located within the text as intended.  
Then for no apparent reason they all appear at the end of the document.  
Having accepted that I should continue preparation and leave the float 
problem to be resolved later, I continued work and left the floats 
alone. In adding more text, some before and some after the first float 
location in the lyx document, all the floats suddenly reappeared at 
their intended positions.

    Has anyone experienced anything similar.  I feel I should add a bug 
report but have no idea what to describe!

Regards
Frank Salter